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configure: better CFLAGS checking

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needed for compatibility with older gcc.  Also, threw in
some warnings for things I find offensive
(declaration-after-statement, shadow)

git-svn-id: https://svn.musicpd.org/mpd/trunk@7299 09075e82-0dd4-0310-85a5-a0d7c8717e4f
This commit is contained in:
Eric Wong 2008-04-12 04:16:22 +00:00
parent dd20681daa
commit 4e4441fd32
2 changed files with 28 additions and 2 deletions
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12
configure.ac
View File

@ -10,6 +10,7 @@ AC_SUBST(MPD_CFLAGS)
AC_SUBST(MP4FF_LIB)
AC_SUBST(MP4FF_SUBDIR)
AC_LANG(C)
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_INSTALL
@ -21,8 +22,15 @@ AC_DEFINE(PROTOCOL_VERSION, "0.14.0", [The mpd protocol version])
MPD_LIBS=""
MPD_CFLAGS=""
if test x$GCC = xyes; then
MPD_CFLAGS="-Wall -Wextra -Wno-unused-parameter -Wno-deprecated-declarations -Wmissing-prototypes"
if test x$GCC = xyes
then
MPD_CHECK_FLAG([-Wall])
MPD_CHECK_FLAG([-Wextra])
MPD_CHECK_FLAG([-Wno-unused-parameter])
MPD_CHECK_FLAG([-Wno-deprecated-declarations])
MPD_CHECK_FLAG([-Wmissing-prototypes])
MPD_CHECK_FLAG([-Wdeclaration-after-statement])
MPD_CHECK_FLAG([-Wshadow])
fi
if test -z "$prefix" || test "x$prefix" = xNONE; then

18
m4/mpd_check_cflag.m4 Normal file
View File

@ -0,0 +1,18 @@
AC_DEFUN([MPD_CHECK_FLAG],[
var=`echo "$1" | tr "-" "_"`
AC_CACHE_CHECK([whether the C compiler accepts $1],
[mpd_check_cflag_$var],[
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
AC_COMPILE_IFELSE([
int main(void) { return 0; }
], [ eval "mpd_check_cflag_$var=yes"
], [ eval "mpd_check_cflag_$var=no" ])
CFLAGS="$save_CFLAGS"
])
if eval "test x`echo '$mpd_check_cflag_'$var` = xyes"
then
MPD_CFLAGS="$MPD_CFLAGS $1"
fi
])
])