1 | # hints/dec_osf.sh |
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2 | |
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3 | # * If you want to debug perl or want to send a |
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4 | # stack trace for inclusion into an bug report, call |
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5 | # Configure with the additional argument -Doptimize=-g2 |
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6 | # or uncomment this assignment to "optimize": |
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7 | # |
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8 | #optimize=-g2 |
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9 | # |
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10 | # If you want both to optimise and debug with the DEC cc |
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11 | # you must have -g3, e.g. "-O4 -g3", and (re)run Configure. |
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12 | # |
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13 | # * gcc can always have both -g and optimisation on. |
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14 | # |
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15 | # * debugging optimised code, no matter what compiler |
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16 | # one is using, can be surprising and confusing because of |
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17 | # the optimisation tricks like code motion, code removal, |
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18 | # loop unrolling, and inlining. The source code and the |
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19 | # executable code simply do not agree any more while in |
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20 | # mid-execution, the optimiser only cares about the results. |
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21 | # |
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22 | # * Configure will automatically add the often quoted |
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23 | # -DDEBUGGING for you if the -g is specified. |
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24 | # |
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25 | # * There is even more optimisation available in the new |
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26 | # (GEM) DEC cc: -O5 and -fast. "man cc" will tell more about them. |
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27 | # The jury is still out whether either or neither help for Perl |
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28 | # and how much. Based on very quick testing, -fast boosts |
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29 | # raw data copy by about 5-15% (-fast brings in, among other |
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30 | # things, inlined, ahem, fast memcpy()), while on the other |
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31 | # hand searching things (index, m//, s///), seems to get slower. |
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32 | # Your mileage will vary. |
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33 | # |
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34 | # * The -std is needed because the following compiled |
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35 | # without the -std and linked with -lm |
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36 | # |
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37 | # #include <math.h> |
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38 | # #include <stdio.h> |
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39 | # int main(){short x=10,y=sqrt(x);printf("%d\n",y);} |
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40 | # |
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41 | # will in Digital UNIX 3.* and 4.0b print 0 -- and in Digital |
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42 | # UNIX 4.0{,a} dump core: Floating point exception in the printf(), |
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43 | # the y has become a signaling NaN. |
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44 | # |
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45 | # * Compilation warnings like: |
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46 | # |
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47 | # "Undefined the ANSI standard macro ..." |
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48 | # |
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49 | # can be ignored, at least while compiling the POSIX extension |
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50 | # and especially if using the sfio (the latter is not a standard |
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51 | # part of Perl, never mind if it says little to you). |
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52 | # |
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53 | |
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54 | # If using the DEC compiler we must find out the DEC compiler style: |
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55 | # the style changed between Digital UNIX (aka DEC OSF/1) 3 and |
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56 | # Digital UNIX 4. The old compiler was originally from Ultrix and |
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57 | # the MIPS company, the new compiler is originally from the VAX world |
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58 | # and it is called GEM. Many of the options we are going to use depend |
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59 | # on the compiler style. |
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60 | |
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61 | cc=${cc:-cc} |
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62 | |
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63 | # do NOT, I repeat, *NOT* take away the leading tabs |
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64 | # Configure Black Magic (TM) |
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65 | # reset |
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66 | _DEC_cc_style= |
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67 | case "`$cc -v 2>&1 | grep cc`" in |
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68 | *gcc*) _gcc_version=`$cc -v 2>&1 | grep "gcc version" | sed 's%^gcc version \([0-9]*\)\.\([0-9]*\) .*%\1 \2%'` |
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69 | set $_gcc_version |
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70 | if test "$1" -lt 2 -o \( "$1" -eq 2 -a "$2" -lt 95 \); then |
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71 | cat >&4 <<EOF |
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72 | |
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73 | Your cc seems to be gcc and its version seems to be less than 2.95. |
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74 | This is not a good idea since old versions of gcc are known to produce |
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75 | buggy code when compiling Perl (and no doubt for other programs, too). |
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76 | |
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77 | Therefore, I strongly suggest upgrading your gcc. (Why don't you |
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78 | use the vendor cc is also a good question. It comes with the operating |
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79 | system and produces good code.) |
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80 | |
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81 | Note that as of gcc 2.95 (19990728) and Perl 5.6.0 (end of March 2000) |
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82 | if the said Perl is compiled with the said gcc the lib/sdbm test will |
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83 | dump core. As this doesn't happen with the vendor cc, this is |
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84 | most probably a lingering bug in gcc. Therefore unless you have |
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85 | a better gcc you are still better off using the vendor cc. |
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86 | |
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87 | Cannot continue, aborting. |
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88 | |
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89 | EOF |
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90 | exit 1 |
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91 | fi |
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92 | ;; |
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93 | *) # compile something small: taint.c is fine for this. |
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94 | # the main point is the '-v' flag of 'cc'. |
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95 | case "`cc -v -I. -c taint.c -o taint$$.o 2>&1`" in |
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96 | */gemc_cc*) # we have the new DEC GEM CC |
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97 | _DEC_cc_style=new |
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98 | ;; |
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99 | *) # we have the old MIPS CC |
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100 | _DEC_cc_style=old |
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101 | ;; |
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102 | esac |
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103 | # cleanup |
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104 | rm -f taint$$.o |
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105 | ;; |
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106 | esac |
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107 | |
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108 | # be nauseatingly ANSI |
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109 | case "`$cc -v 2>&1 | grep gcc`" in |
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110 | *gcc*) ccflags="$ccflags -ansi" |
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111 | ;; |
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112 | *) ccflags="$ccflags -std" |
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113 | ;; |
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114 | esac |
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115 | |
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116 | # for gcc the Configure knows about the -fpic: |
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117 | # position-independent code for dynamic loading |
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118 | |
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119 | # we want optimisation |
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120 | |
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121 | case "$optimize" in |
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122 | '') case "`$cc -v 2>&1 | grep gcc`" in |
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123 | *gcc*) |
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124 | optimize='-O3' ;; |
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125 | *) case "$_DEC_cc_style" in |
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126 | new) optimize='-O4' |
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127 | ccflags="$ccflags -fprm d -ieee" |
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128 | ;; |
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129 | old) optimize='-O2 -Olimit 3200' ;; |
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130 | esac |
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131 | ccflags="$ccflags -D_INTRINSICS" |
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132 | ;; |
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133 | esac |
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134 | ;; |
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135 | esac |
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136 | |
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137 | # Make glibpth agree with the compiler suite. Note that /shlib |
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138 | # is not here. That's on purpose. Even though that's where libc |
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139 | # really lives from V4.0 on, the linker (and /sbin/loader) won't |
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140 | # look there by default. The sharable /sbin utilities were all |
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141 | # built with "-Wl,-rpath,/shlib" to get around that. This makes |
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142 | # no attempt to figure out the additional location(s) searched by |
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143 | # gcc, since not all versions of gcc are easily coerced into |
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144 | # revealing that information. |
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145 | glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc" |
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146 | glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib" |
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147 | |
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148 | # dlopen() is in libc |
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149 | libswanted="`echo $libswanted | sed -e 's/ dl / /'`" |
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150 | |
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151 | # libPW contains nothing useful for perl |
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152 | libswanted="`echo $libswanted | sed -e 's/ PW / /'`" |
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153 | |
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154 | # libnet contains nothing useful for perl here, and doesn't work |
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155 | libswanted="`echo $libswanted | sed -e 's/ net / /'`" |
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156 | |
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157 | # libbsd contains nothing used by perl that is not already in libc |
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158 | libswanted="`echo $libswanted | sed -e 's/ bsd / /'`" |
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159 | |
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160 | # libc need not be separately listed |
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161 | libswanted="`echo $libswanted | sed -e 's/ c / /'`" |
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162 | |
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163 | # ndbm is already in libc |
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164 | libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`" |
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165 | |
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166 | # the basic lddlflags used always |
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167 | lddlflags='-shared -expect_unresolved "*"' |
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168 | |
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169 | # Fancy compiler suites use optimising linker as well as compiler. |
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170 | # <spider@Orb.Nashua.NH.US> |
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171 | case "`uname -r`" in |
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172 | *[123].*) # old loader |
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173 | lddlflags="$lddlflags -O3" |
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174 | ;; |
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175 | *) if $test "X$optimize" = "X$undef"; then |
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176 | lddlflags="$lddlflags -msym" |
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177 | else |
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178 | case "`/usr/sbin/sizer -v`" in |
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179 | *4.0D*) |
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180 | # QAR 56761: -O4 + .so may produce broken code, |
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181 | # fixed in 4.0E or better. |
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182 | ;; |
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183 | *) |
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184 | lddlflags="$lddlflags $optimize" |
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185 | ;; |
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186 | esac |
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187 | # -msym: If using a sufficiently recent /sbin/loader, |
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188 | # keep the module symbols with the modules. |
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189 | lddlflags="$lddlflags -msym -std" |
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190 | fi |
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191 | ;; |
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192 | esac |
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193 | # Yes, the above loses if gcc does not use the system linker. |
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194 | # If that happens, let me know about it. <jhi@iki.fi> |
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195 | |
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196 | |
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197 | # If debugging or (old systems and doing shared) |
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198 | # then do not strip the lib, otherwise, strip. |
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199 | # As noted above the -DDEBUGGING is added automagically by Configure if -g. |
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200 | case "$optimize" in |
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201 | *-g*) ;; # left intentionally blank |
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202 | *) case "`uname -r`" in |
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203 | *[123].*) |
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204 | case "$useshrplib" in |
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205 | false|undef|'') lddlflags="$lddlflags -s" ;; |
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206 | esac |
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207 | ;; |
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208 | *) lddlflags="$lddlflags -s" |
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209 | ;; |
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210 | esac |
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211 | ;; |
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212 | esac |
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213 | |
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214 | # |
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215 | # Make embedding in things like INN and Apache more memory friendly. |
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216 | # Keep it overridable on the Configure command line, though, so that |
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217 | # "-Uuseshrplib" prevents this default. |
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218 | # |
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219 | |
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220 | case "$_DEC_cc_style.$useshrplib" in |
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221 | new.) useshrplib="$define" ;; |
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222 | esac |
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223 | |
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224 | # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for |
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225 | # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed, |
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226 | # please adjust this appropriately. See also pp_sys.c just before the |
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227 | # emulate_eaccess(). |
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228 | |
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229 | # Fixed in V5.0A. |
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230 | case "`/usr/sbin/sizer -v`" in |
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231 | *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*) |
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232 | : ok |
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233 | ;; |
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234 | *) |
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235 | # V5.0 or previous |
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236 | pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"' |
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237 | ;; |
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238 | esac |
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239 | |
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240 | # The off_t is already 8 bytes, so we do have largefileness. |
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241 | |
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242 | cat > UU/usethreads.cbu <<'EOCBU' |
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243 | # This script UU/usethreads.cbu will get 'called-back' by Configure |
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244 | # after it has prompted the user for whether to use threads. |
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245 | case "$usethreads" in |
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246 | $define|true|[yY]*) |
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247 | # Threads interfaces changed with V4.0. |
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248 | case "`$cc -v 2>&1 | grep gcc`" in |
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249 | *gcc*)ccflags="-D_REENTRANT $ccflags" ;; |
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250 | *) case "`uname -r`" in |
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251 | *[123].*) ccflags="-threads $ccflags" ;; |
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252 | *) ccflags="-pthread $ccflags" ;; |
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253 | esac |
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254 | ;; |
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255 | esac |
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256 | case "`uname -r`" in |
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257 | *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;; |
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258 | *) libswanted="$libswanted pthread exc" ;; |
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259 | esac |
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260 | |
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261 | case "$usemymalloc" in |
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262 | '') |
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263 | usemymalloc='n' |
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264 | ;; |
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265 | esac |
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266 | ;; |
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267 | esac |
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268 | EOCBU |
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269 | |
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270 | cat > UU/uselongdouble.cbu <<'EOCBU' |
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271 | # This script UU/uselongdouble.cbu will get 'called-back' by Configure |
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272 | # after it has prompted the user for whether to use long doubles. |
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273 | case "$uselongdouble" in |
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274 | $define|true|[yY]*) d_Gconvert='sprintf((b),"%.*Lg",(n),(x))' ;; |
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275 | esac |
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276 | EOCBU |
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277 | |
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278 | # |
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279 | # Unset temporary variables no more needed. |
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280 | # |
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281 | |
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282 | unset _DEC_cc_style |
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283 | |
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284 | # |
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285 | # History: |
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286 | # |
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287 | # perl5.005_51: |
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288 | # |
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289 | # September-1998 Jarkko Hietaniemi <jhi@iki.fi> |
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290 | # |
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291 | # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support). |
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292 | # |
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293 | # perl5.004_57: |
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294 | # |
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295 | # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
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296 | # |
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297 | # * Newer Digital UNIX compilers enforce signaling for NaN without |
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298 | # -ieee. Added -fprm d at the same time since it's friendlier for |
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299 | # embedding. |
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300 | # |
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301 | # * Fixed the library search path to match cc, ld, and /sbin/loader. |
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302 | # |
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303 | # * Default to building -Duseshrplib on newer systems. -Uuseshrplib |
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304 | # still overrides. |
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305 | # |
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306 | # * Fix -pthread additions for useshrplib. ld has no -pthread option. |
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307 | # |
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308 | # |
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309 | # perl5.004_04: |
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310 | # |
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311 | # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
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312 | # |
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313 | # * libnet on Digital UNIX is for JAVA, not for sockets. |
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314 | # |
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315 | # |
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316 | # perl5.003_28: |
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317 | # |
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318 | # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
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319 | # |
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320 | # * Restructuring Spider's suggestions. |
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321 | # |
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322 | # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags. |
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323 | # |
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324 | # * ld -s cannot be used in older Digital UNIXes when doing shared. |
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325 | # |
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326 | # |
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327 | # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
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328 | # |
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329 | # * -hidden removed. |
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330 | # |
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331 | # * -DSTANDARD_C removed. |
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332 | # |
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333 | # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed) |
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334 | # |
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335 | # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted. |
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336 | # |
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337 | # * -msym for the newer runtime loaders. |
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338 | # |
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339 | # * $optimize also in $lddflags. |
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340 | # |
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341 | # |
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342 | # perl5.003_27: |
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343 | # |
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344 | # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
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345 | # |
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346 | # * unset _DEC_cc_style and more commentary on -std. |
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347 | # |
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348 | # |
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349 | # perl5.003_26: |
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350 | # |
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351 | # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
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352 | # |
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353 | # * -std and -ansi. |
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354 | # |
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355 | # |
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356 | # perl5.003_24: |
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357 | # |
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358 | # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
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359 | # |
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360 | # * Fixing the note on -DDEBUGGING. |
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361 | # |
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362 | # * Note on -O5 -fast. |
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363 | # |
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364 | # |
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365 | # perl5.003_23: |
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366 | # |
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367 | # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
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368 | # |
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369 | # * Notes on how to do both optimisation and debugging. |
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370 | # |
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371 | # |
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372 | # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
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373 | # |
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374 | # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm |
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375 | # |
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376 | # * Restructure the $lddlflags build. |
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377 | # |
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378 | # * $optimize based on which compiler we have. |
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379 | # |
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380 | # |
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381 | # perl5.003_22: |
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382 | # |
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383 | # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
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384 | # |
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385 | # * Added comments 'how to create a debugging version of perl' |
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386 | # |
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387 | # * Fixed logic of this script to prevent stripping of shared |
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388 | # objects by the loader (see ld man page for -s) is debugging |
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389 | # is set via the -g switch. |
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390 | # |
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391 | # |
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392 | # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
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393 | # |
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394 | # * now 'dl' is always removed from libswanted. Not only if |
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395 | # optimize is an empty string. |
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396 | # |
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397 | # |
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398 | # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
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399 | # |
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400 | # * Removed 'dl' from libswanted: When the FreePort binary |
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401 | # translator for Sun binaries is installed Configure concludes |
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402 | # that it should use libdl.x.yz.fpx.so :-( |
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403 | # Because the dlopen, dlclose,... calls are in the |
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404 | # C library it not necessary at all to check for the |
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405 | # dl library. Therefore dl is removed from libswanted. |
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406 | # |
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407 | # |
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408 | # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
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409 | # |
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410 | # * Set -Olimit to 3200 because perl_yylex.c got too big |
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411 | # for the optimizer. |
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412 | # |
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