nginx/auto/cc/gcc

   1
   2 # Copyright (C) Igor Sysoev
   3
   4
   5 # gcc 2.7.2.3, 2.8.1, 2.95.4, egcs-1.1.2
   6 #     3.0.4, 3.1.1, 3.2.3, 3.3.2, 3.3.3, 3.3.4, 3.4.0, 3.4.2
   7 #     4.0.0, 4.0.1, 4.1.0
   8
   9
  10 NGX_GCC_VER=`$CC -v 2>&1 | grep 'gcc version' 2>&1 \
  11                          | sed -e 's/^.* version \(.*\)/\1/'`
  12
  13 echo " + gcc version: $NGX_GCC_VER"
  14
  15 have=NGX_COMPILER value="\"gcc $NGX_GCC_VER\"" . auto/define
  16
  17
  18 # Solaris 7's /usr/ccs/bin/as does not support "-pipe"
  19
  20 CC_TEST_FLAGS="-pipe"
  21
  22 ngx_feature="gcc -pipe switch"
  23 ngx_feature_name=
  24 ngx_feature_run=no
  25 ngx_feature_incs=
  26 ngx_feature_path=
  27 ngx_feature_libs=
  28 ngx_feature_test=
  29 . auto/feature
  30
  31 CC_TEST_FLAGS=
  32
  33 if [ $ngx_found = yes ]; then
  34     PIPE="-pipe"
  35 fi
  36
  37
  38 case "$NGX_MACHINE" in
  39
  40     sun4u | sun4v | sparc | sparc64 )
  41         # "-mcpu=v9" enables the "casa" assembler instruction
  42         CFLAGS="$CFLAGS -mcpu=v9"
  43     ;;
  44
  45 esac
  46
  47
  48 # optimizations
  49
  50 #NGX_GCC_OPT="-O2"
  51 #NGX_GCC_OPT="-Os"
  52 NGX_GCC_OPT="-O"
  53
  54 CFLAGS="$CFLAGS $NGX_GCC_OPT"
  55
  56 #CFLAGS="$CFLAGS -fomit-frame-pointer"
  57
  58 case $CPU in
  59     pentium)
  60         # optimize for Pentium and Athlon
  61         CPU_OPT="-march=pentium"
  62         NGX_CPU_CACHE_LINE=32
  63     ;;
  64
  65     pentiumpro | pentium3)
  66         # optimize for Pentium Pro, Pentium II and Pentium III
  67         CPU_OPT="-march=pentiumpro"
  68         NGX_CPU_CACHE_LINE=32
  69     ;;
  70
  71     pentium4)
  72         # optimize for Pentium 4, gcc 3.x
  73         CPU_OPT="-march=pentium4"
  74         NGX_CPU_CACHE_LINE=128
  75     ;;
  76
  77     athlon)
  78         # optimize for Athlon, gcc 3.x
  79         CPU_OPT="-march=athlon"
  80         NGX_CPU_CACHE_LINE=64
  81     ;;
  82
  83     opteron)
  84         # optimize for Opteron, gcc 3.x
  85         CPU_OPT="-march=opteron"
  86         NGX_CPU_CACHE_LINE=64
  87     ;;
  88
  89     sparc32)
  90         # build 32-bit UltraSparc binary
  91         CPU_OPT="-m32"
  92         CORE_LINK="$CORE_LINK -m32"
  93         CC_AUX_FLAGS="$CC_AUX_FLAGS -m32"
  94         NGX_CPU_CACHE_LINE=64
  95     ;;
  96
  97     sparc64)
  98         # build 64-bit UltraSparc binary
  99         CPU_OPT="-m64"
 100         CORE_LINK="$CORE_LINK -m64"
 101         CC_AUX_FLAGS="$CC_AUX_FLAGS -m64"
 102         NGX_CPU_CACHE_LINE=64
 103     ;;
 104
 105     ppc64)
 106         # build 64-bit PowerPC binary
 107         CPU_OPT="-m64"
 108         CPU_OPT="$CPU_OPT -falign-functions=32 -falign-labels=32"
 109         CPU_OPT="$CPU_OPT -falign-loops=32 -falign-jumps=32"
 110         CORE_LINK="$CORE_LINK -m64"
 111         CC_AUX_FLAGS="$CC_AUX_FLAGS -m64"
 112         NGX_CPU_CACHE_LINE=128
 113     ;;
 114
 115 esac
 116
 117
 118 case "$NGX_GCC_VER" in
 119     2.7*)
 120         # batch build
 121         CPU_OPT=
 122     ;;
 123 esac
 124
 125
 126 CFLAGS="$CFLAGS $PIPE $CPU_OPT"
 127
 128 if [ ".$PCRE_OPT" = "." ]; then
 129     PCRE_OPT="-O2 -fomit-frame-pointer $PIPE $CPU_OPT"
 130 else
 131     PCRE_OPT="$PCRE_OPT $PIPE"
 132 fi
 133
 134 if [ ".$MD5_OPT" = "." ]; then
 135     MD5_OPT="-O2 -fomit-frame-pointer $PIPE $CPU_OPT"
 136 else
 137     MD5_OPT="$MD5_OPT $PIPE"
 138 fi
 139
 140 if [ ".$ZLIB_OPT" = "." ]; then
 141     ZLIB_OPT="-O2 -fomit-frame-pointer $PIPE $CPU_OPT"
 142 else
 143     ZLIB_OPT="$ZLIB_OPT $PIPE"
 144 fi
 145
 146
 147 # warnings
 148
 149 # -W requires at least -O
 150 CFLAGS="$CFLAGS ${NGX_GCC_OPT:--O} -W"
 151
 152 CFLAGS="$CFLAGS -Wall -Wpointer-arith"
 153 #CFLAGS="$CFLAGS -Wconversion"
 154 #CFLAGS="$CFLAGS -Winline"
 155
 156
 157 case "$NGX_GCC_VER" in
 158     3.* | 4.* )
 159         # we have a lot of the unused function arguments
 160         CFLAGS="$CFLAGS -Wno-unused-parameter"
 161         CFLAGS="$CFLAGS -Wno-unused-function"
 162         CFLAGS="$CFLAGS -Wunused-variable"
 163         CFLAGS="$CFLAGS -Wunused-value"
 164         #CFLAGS="$CFLAGS -Wunreachable-code"
 165     ;;
 166
 167     *)
 168         # we have a lot of the unused function arguments
 169         CFLAGS="$CFLAGS -Wno-unused"
 170     ;;
 171 esac
 172
 173
 174 # stop on warning
 175 CFLAGS="$CFLAGS -Werror"
 176
 177 # debug
 178 CFLAGS="$CFLAGS -g"
 179
 180 # DragonFly's gcc3 generates DWARF
 181 #CFLAGS="$CFLAGS -g -gstabs"
 182
 183 if [ ".$CPP" = "." ]; then
 184     CPP="$CC -E"
 185 fi