[vlc-commits] M4 C++ flags macros

[Rémi Denis-Courmont]

vlc | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Sat May 14 13:53:28 2011 +0300| [631e9e7f8adbdb822fc299604eba1ea06d27c894] | committer: Rémi Denis-Courmont

M4 C++ flags macros

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=631e9e7f8adbdb822fc299604eba1ea06d27c894
---

 m4/flags.m4 |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/m4/flags.m4 b/m4/flags.m4
index 2db4feb..e5def0b 100644
--- a/m4/flags.m4
+++ b/m4/flags.m4
@@ -37,6 +37,35 @@ AC_DEFUN([RDC_PROG_CC_WFLAGS],
   done
 ])
 
+AC_DEFUN([RDC_PROG_CXX_FLAGS_IFELSE],
+[AC_LANG_ASSERT(C++)
+  CXXFLAGS_save="${CXXFLAGS}"
+  as_ac_var=`echo "ac_cv_prog_cxx_flags_$1" | $as_tr_sh`
+  AC_CACHE_CHECK([if $CXX accepts $1], [$as_ac_var], [
+    CXXFLAGS="${CXXFLAGS} $1"
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
+      eval "$as_ac_var=yes"
+    ],[
+      eval "$as_ac_var=no"
+    ])
+  ])
+
+  ac_res=`eval echo '${'$as_ac_var'}'`
+  CFLAGS="${CFLAGS_save}"
+  AS_IF([test "${ac_res}" != "no"], [$2], [$3])
+])
+
+AC_DEFUN([RDC_PROG_CXX_FLAGS],
+[AC_LANG_ASSERT(C++)
+  RDC_PROG_CXX_FLAGS_IFELSE([$1], [CXXFLAGS="${CXXFLAGS} $1"])
+])
+
+AC_DEFUN([RDC_PROG_CXX_WFLAGS],
+[ for a in $1; do
+    RDC_PROG_CXX_FLAGS([-W$a])
+  done
+])
+
 AC_DEFUN([RDC_PROG_LINK_FLAGS_IFELSE],
 [AC_LANG_ASSERT(C)
   LDFLAGS_save="${LDFLAGS}"