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Lines 169-213
Link Here
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| 169 |
else |
169 |
else |
| 170 |
CFLAGS="" |
170 |
CFLAGS="" |
| 171 |
dnl O3 generally gives better performance than O2 in both Intel and ARM |
171 |
dnl O3 generally gives better performance than O2 in both Intel and ARM |
| 172 |
AC_CHECK_CC_OPT([-O3], [CFLAGS="$CFLAGS -O3"], []) |
172 |
AX_CHECK_COMPILE_FLAG([-O3], [CFLAGS="$CFLAGS -O3"], []) |
| 173 |
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173 |
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| 174 |
if test $ac_enable_32 = yes ; then |
174 |
if test $ac_enable_32 = yes ; then |
| 175 |
dnl Force build for 32 bit x86 |
175 |
dnl Force build for 32 bit x86 |
| 176 |
AC_CHECK_CC_OPT([-m32 -march=i686], [CFLAGS="$CFLAGS -m32 -march=i686"], []) |
176 |
AX_CHECK_COMPILE_FLAG([-m32 -march=i686], [CFLAGS="$CFLAGS -m32 -march=i686"], []) |
| 177 |
AC_CHECK_CC_OPT([-fomit-frame-pointer], [CFLAGS="$CFLAGS -fomit-frame-pointer"], []) |
177 |
AX_CHECK_COMPILE_FLAG([-fomit-frame-pointer], [CFLAGS="$CFLAGS -fomit-frame-pointer"], []) |
| 178 |
elif $GREP a02082\\\|a22082 /proc/cpuinfo >/dev/null 2>&1; then |
178 |
elif $GREP a02082\\\|a22082 /proc/cpuinfo >/dev/null 2>&1; then |
| 179 |
dnl Raspberry Pi 3 |
179 |
dnl Raspberry Pi 3 |
| 180 |
dnl GCC 4 has problems with -march=native in Raspbian, |
180 |
dnl GCC 4 has problems with -march=native in Raspbian, |
| 181 |
dnl resulting in a "double free or corruption" error |
181 |
dnl resulting in a "double free or corruption" error |
| 182 |
dnl See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=139091 |
182 |
dnl See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=139091 |
| 183 |
AC_CHECK_CC_OPT([-march=armv8-a+crc], [CFLAGS="$CFLAGS -march=armv8-a+crc"], []) |
183 |
AX_CHECK_COMPILE_FLAG([-march=armv8-a+crc], [CFLAGS="$CFLAGS -march=armv8-a+crc"], []) |
| 184 |
AC_CHECK_CC_OPT([-mtune=cortex-a53], [CFLAGS="$CFLAGS -mtune=cortex-a53"], []) |
184 |
AX_CHECK_COMPILE_FLAG([-mtune=cortex-a53], [CFLAGS="$CFLAGS -mtune=cortex-a53"], []) |
| 185 |
AC_CHECK_CC_OPT([-mfloat-abi=hard], [CFLAGS="$CFLAGS -mfloat-abi=hard"], []) |
185 |
AX_CHECK_COMPILE_FLAG([-mfloat-abi=hard], [CFLAGS="$CFLAGS -mfloat-abi=hard"], []) |
| 186 |
AC_CHECK_CC_OPT([-mfpu=crypto-neon-fp-armv8], [CFLAGS="$CFLAGS -mfpu=crypto-neon-fp-armv8"], []) |
186 |
AX_CHECK_COMPILE_FLAG([-mfpu=crypto-neon-fp-armv8], [CFLAGS="$CFLAGS -mfpu=crypto-neon-fp-armv8"], []) |
| 187 |
AC_CHECK_CC_OPT([-funsafe-math-optimizations], [CFLAGS="$CFLAGS -funsafe-math-optimizations"], []) |
187 |
AX_CHECK_COMPILE_FLAG([-funsafe-math-optimizations], [CFLAGS="$CFLAGS -funsafe-math-optimizations"], []) |
| 188 |
dnl Raspberry Pi 2 |
188 |
dnl Raspberry Pi 2 |
| 189 |
elif $GREP a01040\\\|a01041\\\|a21041\\\|a22042 /proc/cpuinfo >/dev/null 2>&1; then |
189 |
elif $GREP a01040\\\|a01041\\\|a21041\\\|a22042 /proc/cpuinfo >/dev/null 2>&1; then |
| 190 |
AC_CHECK_CC_OPT([-march=armv7-a], [CFLAGS="$CFLAGS -march=armv7-a"], []) |
190 |
AX_CHECK_COMPILE_FLAG([-march=armv7-a], [CFLAGS="$CFLAGS -march=armv7-a"], []) |
| 191 |
AC_CHECK_CC_OPT([-mfpu=neon-vfpv4], [CFLAGS="$CFLAGS -mfpu=neon-vfpv4"], []) |
191 |
AX_CHECK_COMPILE_FLAG([-mfpu=neon-vfpv4], [CFLAGS="$CFLAGS -mfpu=neon-vfpv4"], []) |
| 192 |
else |
192 |
else |
| 193 |
AC_CHECK_CC_OPT([-march=native], [CFLAGS="$CFLAGS -march=native"], []) |
193 |
AX_CHECK_COMPILE_FLAG([-march=native], [CFLAGS="$CFLAGS -march=native"], []) |
| 194 |
AC_CHECK_CC_OPT([-fomit-frame-pointer], [CFLAGS="$CFLAGS -fomit-frame-pointer"], []) |
194 |
AX_CHECK_COMPILE_FLAG([-fomit-frame-pointer], [CFLAGS="$CFLAGS -fomit-frame-pointer"], []) |
| 195 |
fi |
195 |
fi |
| 196 |
|
196 |
|
| 197 |
dnl Code was written when compilers where not aggressively optimizing undefined behaviour about aliasing |
197 |
dnl Code was written when compilers where not aggressively optimizing undefined behaviour about aliasing |
| 198 |
dnl WARNING! At present disabled to maximize performance |
198 |
dnl WARNING! At present disabled to maximize performance |
| 199 |
dnl AC_CHECK_CC_OPT([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-strict-aliasing"], []) |
199 |
dnl AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-strict-aliasing"], []) |
| 200 |
dnl Code was written when compilers where not aggressively optimizing undefined behaviour about overflow in signed integers |
200 |
dnl Code was written when compilers where not aggressively optimizing undefined behaviour about overflow in signed integers |
| 201 |
dnl WARNING! At present disabled to maximize performance |
201 |
dnl WARNING! At present disabled to maximize performance |
| 202 |
dnl AC_CHECK_CC_OPT([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-strict-overflow"], []) |
202 |
dnl AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-strict-overflow"], []) |
| 203 |
dnl Code was written on Intel where char is signed |
203 |
dnl Code was written on Intel where char is signed |
| 204 |
AC_CHECK_CC_OPT([-fsigned-char], [CFLAGS="$CFLAGS -fsigned-char"], []) |
204 |
AX_CHECK_COMPILE_FLAG([-fsigned-char], [CFLAGS="$CFLAGS -fsigned-char"], []) |
| 205 |
dnl We are not interested in stack protection |
205 |
dnl We are not interested in stack protection |
| 206 |
AC_CHECK_CC_OPT([-fno-stack-protector], [CFLAGS="$CFLAGS -fno-stack-protector"], []) |
206 |
AX_CHECK_COMPILE_FLAG([-fno-stack-protector], [CFLAGS="$CFLAGS -fno-stack-protector"], []) |
| 207 |
dnl Some useful warnings |
207 |
dnl Some useful warnings |
| 208 |
AC_CHECK_CC_OPT([-Wall], [CFLAGS="$CFLAGS -Wall"], []) |
208 |
AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="$CFLAGS -Wall"], []) |
| 209 |
AC_CHECK_CC_OPT([-Wno-sign-compare], [CFLAGS="$CFLAGS -Wno-sign-compare"], []) |
209 |
AX_CHECK_COMPILE_FLAG([-Wno-sign-compare], [CFLAGS="$CFLAGS -Wno-sign-compare"], []) |
| 210 |
AC_CHECK_CC_OPT([-Wno-unused], [CFLAGS="$CFLAGS -Wno-unused"], []) |
210 |
AX_CHECK_COMPILE_FLAG([-Wno-unused], [CFLAGS="$CFLAGS -Wno-unused"], []) |
| 211 |
fi |
211 |
fi |
| 212 |
if test ! -z $ac_host_cflags; then |
212 |
if test ! -z $ac_host_cflags; then |
| 213 |
CFLAGS="$ac_host_cflags $CFLAGS" |
213 |
CFLAGS="$ac_host_cflags $CFLAGS" |
