AC_ARG_ENABLE(compile-warnings,
[ --enable-compile-warnings=[no/minimum/yes] Turn on compiler warnings.],,enable_compile_warnings=yes)
- AC_MSG_CHECKING(what warning flags to pass to the C compiler)
+ AC_MSG_CHECKING(the warning flags for this compiler)
warnCFLAGS=
- if test "x$GCC" != xyes; then
- enable_compile_warnings=no
- fi
-
- if test "x$enable_compile_warnings" != "xno"; then
- if test "x$GCC" = "xyes"; then
- case " $CFLAGS " in
- *-Wall*) ;;
- *) warnCFLAGS="-g -Wall -Wunused" ;;
- esac
+ if test "x$GCC" = "xyes"; then
+ case " $CFLAGS " in
+ *-Wall*) ;;
+ *) warnCFLAGS="-g -Wall -Wunused" ;;
+ esac
- ## -W is not all that useful. And it cannot be controlled
- ## with individual -Wno-xxx flags, unlike -Wall
- if test "x$enable_compile_warnings" = "xyes"; then
- warnCFLAGS="$warnCFLAGS -Wmissing-prototypes -Wmissing-declarations \
- -finline-functions -Wshadow -Wpointer-arith -Wchar-subscripts \
- -Wformat=2 -Wno-unused-variable -Wno-unused-function -Wwrite-strings -Werror"
- fi
+ ## -W is not all that useful. And it cannot be controlled
+ ## with individual -Wno-xxx flags, unlike -Wall
+ if test "x$enable_compile_warnings" = "xyes"; then
+ warnCFLAGS="$warnCFLAGS -Wmissing-prototypes -Wmissing-declarations \
+ -finline-functions -Wshadow -Wpointer-arith -Wchar-subscripts \
+ -Wformat=2 -Wno-unused-variable -Wno-unused-function -Wwrite-strings -Werror"
fi
fi
+
AC_MSG_RESULT($warnCFLAGS)
AC_ARG_ENABLE(iso-c,
[ --enable-iso-c Try to warn if code is not ISO C ],,
enable_iso_c=no)
- AC_MSG_CHECKING(what language compliance flags to pass to the C compiler)
+ AC_MSG_CHECKING(the language compliance flags for this compiler)
complCFLAGS=
- if test "x$enable_iso_c" != "xno"; then
- if test "x$GCC" = "xyes"; then
- case " $CFLAGS " in
- *-ansi*) ;;
- *) complCFLAGS="$complCFLAGS -ansi" ;;
- esac
+ if test "x$GCC" = "xyes"; then
+ case " $CFLAGS " in
+ *-ansi*) ;;
+ *) complCFLAGS="$complCFLAGS -ansi" ;;
+ esac
+ case " $CFLAGS " in
+ *-pedantic*) ;;
+ *) complCFLAGS="$complCFLAGS -pedantic" ;;
+ esac
+ fi
+ AC_MSG_RESULT($complCFLAGS)
+
+
+ AC_MSG_CHECKING(the optimization flags for this compiler)
+ optCFLAGS=
+ if test "x$GCC" = "xyes" ; then
+ optCFLAGS="-ffast-math -funroll-loops -fno-strict-aliasing"
case " $CFLAGS " in
- *-pedantic*) ;;
- *) complCFLAGS="$complCFLAGS -pedantic" ;;
+ *-O*) ;;
+ *) optCFLAGS="-03" ;;
esac
- fi
fi
AC_MSG_RESULT($complCFLAGS)
- if test "x$cflags_set" != "xyes"; then
- CFLAGS="$CFLAGS $warnCFLAGS $complCFLAGS"
+
+ # Take the right flags
+ if test "x$cflags_set" != "xyes" ; then
+ if test "x$enable_iso_c" != "xno"; then
+ CFLAGS="$CFLAGS $complCFLAGS"
+ fi
+ if test "x$enable_compile_warnings" != "xno" ; then
+ CFLAGS="$CFLAGS $warnCFLAGS"
+ fi
+
cflags_set=yes
AC_SUBST(cflags_set)
fi