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| author | Ronnie Sahlberg <ronnie_sahlberg@ozemail.com.au> | 2007-03-26 06:52:04 +0000 |
|---|---|---|
| committer | Ronnie Sahlberg <ronnie_sahlberg@ozemail.com.au> | 2007-03-26 06:52:04 +0000 |
| commit | 6ecf2ccc7b1406b9af000a4d01e6c70737b1fe3e (patch) | |
| tree | e48b57494335f449237c727a91be4f4be81751d1 /configure.in | |
| parent | 46b8669566a546d6887d3f82aace2d8dea3608ff (diff) | |
older versions of gcc do not check -W parameters when only running the preprocessor.
change the test for whether -Wdeclaration-after-statement so that it also works for ancient gcc
svn path=/trunk/; revision=21205
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/configure.in b/configure.in index a5eb2119a5..afc9ae885f 100644 --- a/configure.in +++ b/configure.in @@ -175,12 +175,22 @@ else fi AC_MSG_CHECKING(to see if we can add '-Wdeclaration-after-statement' to CFLAGS) -if test x$GCC != x && echo yes | $CC -E -Wdeclaration-after-statement - 2>&1 | grep yes > /dev/null ; then +if test x$GCC == xyes ; then + # some versions of GCC support this directive + rm -rf conftest* + echo "int foo;" >>conftest.c + $CC -c -o conftest.o conftest.c -Wdeclaration-after-statement + if [ $? == 0 ] ; then CFLAGS="$CFLAGS -Wdeclaration-after-statement" AC_MSG_RESULT(yes) + else + AC_MSG_RESULT(no) + fi else + # non-gcc compilers do not support this directive AC_MSG_RESULT(no) fi +rm -rf conftest* AC_ARG_WITH(warnings-as-errors, [ --with-warnings-as-errors Treat warnings as errors (if using gcc). [default=no]], |