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| author | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2015-05-31 09:49:05 +0000 |
|---|---|---|
| committer | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2015-05-31 09:49:05 +0000 |
| commit | 70ae0d06f8d11f616f0a89834ac42d2b0459e06d (patch) | |
| tree | f3af9e65cfab5286efe5bde33721c9843377a9ab | |
| parent | 8a5520c41395975e3344247eb156c7795fd30c7a (diff) | |
| download | mpfr-70ae0d06f8d11f616f0a89834ac42d2b0459e06d.tar.gz | |
[configure.ac] For the gcc compiler, better choice of the -W flags
when the selected language is C++ (e.g. when CC=g++).
(merged changeset r9478 from the trunk)
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/branches/3.1@9479 280ebfd0-de03-0410-8827-d642c229c3f4
| -rw-r--r-- | configure.ac | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 1648b97eb..0e294642c 100644 --- a/configure.ac +++ b/configure.ac @@ -339,7 +339,21 @@ error dnl If compiler is gcc, then use some specific flags. dnl But don't touch user other flags. if test "$test_CFLAGS" != set && test -n "$GCC"; then - CFLAGS="-Wall -Wmissing-prototypes -Wpointer-arith $CFLAGS" + CFLAGS="-Wpointer-arith $CFLAGS" + AC_MSG_CHECKING(whether the selected language is C++) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#if defined (__cplusplus) +# error "C++" +error +#endif + ]], [[]])],[ + AC_MSG_RESULT(no) + CFLAGS="-Wmissing-prototypes $CFLAGS" + ],[ + AC_MSG_RESULT(yes) + CFLAGS="-Wmissing-declarations -Wno-sign-compare $CFLAGS" + ]) + CFLAGS="-Wall $CFLAGS" fi AM_PROG_CC_C_O |