From d7b49bfb16aa28668cb35e76494ff288c6953090 Mon Sep 17 00:00:00 2001 From: oetiker Date: Sun, 21 May 2006 20:20:11 +0000 Subject: [PATCH] make configure test which flags gcc actually accepts ... git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@830 a5681a0c-68f1-0310-ab6d-d61299d08faa --- configure.ac | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/configure.ac b/configure.ac index 3818b05..94ec225 100644 --- a/configure.ac +++ b/configure.ac @@ -189,6 +189,21 @@ AC_PROG_CC AC_PROG_CPP AC_PROG_LIBTOOL +dnl which flags does the compile support? +if test "$GCC" = "yes"; then + for flag in -fno-strict-aliasing -Wall -std=gnu99 -pedantic -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -W; do + oCFLAGS=$CFLAGS + CFLAGS="$CFLAGS $flag" + cachename=rd_cv_gcc_flag_`echo $flag|sed 's/[[^A-Za-z]]/_/g'` + AC_CACHE_CHECK([if gcc likes the $flag flag], $cachename, + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[return 0 ]])],[eval $cachename=yes],[eval $cachename=no])]) + if eval test \$$cachename = no; then + CFLAGS=$oCFLAGS + fi + done +fi + + AC_SUBST(RRD_DEFAULT_FONT) @@ -527,19 +542,6 @@ AC_ARG_VAR(RRDDOCDIR, [[DATADIR/doc/PACKAGE-VERSION] Documentation directory]) if test -z "$RRDDOCDIR"; then RRDDOCDIR='${datadir}/doc/${PACKAGE}-${VERSION}'; fi -dnl Does the compiler like -Wall and -pedantic? -if test "$GCC" = "yes"; then - oCFLAGS=$CFLAGS - CFLAGS="$CFLAGS -fno-strict-aliasing -Wall -std=gnu99 -pedantic -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -W" - AC_CACHE_CHECK(if we can use GCC-specific compiler options, rd_cv_gcc_opt, - [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[return 0 ]])],[rd_cv_gcc_opt=yes],[rd_cv_gcc_opt=no ]) - ] - ) - if test $rd_cv_gcc_opt = no; then - CFLAGS=$oCFLAGS - fi -fi - CONFIGURE_PART(Apply Configuration Information) -- 2.30.2