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configure.ac : Erase default -O2 when setting -O3. 

Previously CFLAGS had a -O3 at the start and a -O2 at the end. According
to the GCC docs:

    https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/Optimize-Options.html

    "If you use multiple -O options, with or without level numbers,
    the last such option is the one that is effective" which means that
    GCC doesn't try to use SIMD to vectorize the code, etc."
This commit is contained in:
Erik de Castro Lopo 2014-07-27 10:08:44 +10:00
parent 221bdc409d
commit f73c82a73d
1 changed files with 4 additions and 2 deletions
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6
configure.ac
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@ -379,16 +379,18 @@ fi
if test "x$debug" = xtrue; then
CPPFLAGS="-DDEBUG $CPPFLAGS"
CFLAGS=$(echo "$CFLAGS" | sed 's/-g//')
CFLAGS="-g $CFLAGS"
else
CPPFLAGS="-DNDEBUG $CPPFLAGS"
CFLAGS="-O3 -funroll-loops -Wall -W -Winline $CFLAGS"
CFLAGS=$(echo "$CFLAGS" | sed 's/-O2//;s/-g//')
CFLAGS="-O3 -funroll-loops $CFLAGS"
fi
XIPH_GCC_VERSION
if test x$ac_cv_c_compiler_gnu = xyes ; then
CFLAGS="$CFLAGS -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wnested-externs -Wshadow -Wundef -Wmissing-declarations -Wunreachable-code " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Winline -Wconversion
CFLAGS="$CFLAGS -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wnested-externs -Wshadow -Wundef -Wmissing-declarations -Wunreachable-code -Winline " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Wconversion
CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wcast-align -Wshadow -Wwrite-strings -Wctor-dtor-privacy -Wnon-virtual-dtor -Wreorder -Wsign-promo -Wundef -Wunreachable-code " # -Wcast-qual -Wbad-function-cast -Wwrite-strings -Woverloaded-virtual -Wmissing-declarations
XIPH_ADD_CFLAGS([-Wdeclaration-after-statement])