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annotate src/libsndfile-1.0.27/M4/add_cxxflags.m4 @ 84:08ae793730bd
Add null config files
| author | Chris Cannam |
|---|---|
| date | Mon, 02 Mar 2020 14:03:47 +0000 |
| parents | 1df64224f5ac |
| children |
| rev | line source |
|---|---|
| Chris@40 | 1 dnl @synopsis MN_ADD_CXXFLAGS |
| Chris@40 | 2 dnl |
| Chris@40 | 3 dnl Add the given option to CXXFLAGS, if it doesn't break the compiler |
| Chris@40 | 4 |
| Chris@40 | 5 AC_DEFUN([MN_ADD_CXXFLAGS], |
| Chris@40 | 6 [AC_MSG_CHECKING([if $CXX accepts $1]) |
| Chris@40 | 7 AC_LANG_ASSERT([C++]) |
| Chris@40 | 8 ac_add_cxxflags__old_cxxflags="$CXXFLAGS" |
| Chris@40 | 9 CXXFLAGS="$1" |
| Chris@40 | 10 AC_TRY_LINK([ |
| Chris@40 | 11 #include <cstdio> |
| Chris@40 | 12 ], |
| Chris@40 | 13 [puts("Hello, World!"); return 0;], |
| Chris@40 | 14 AC_MSG_RESULT([yes]) |
| Chris@40 | 15 CXXFLAGS="$ac_add_cxxflags__old_cxxflags $1", |
| Chris@40 | 16 AC_MSG_RESULT([no]) |
| Chris@40 | 17 CXXFLAGS="$ac_add_cxxflags__old_cxxflags" |
| Chris@40 | 18 ) |
| Chris@40 | 19 ])# MN_ADD_CXXFLAGS |