diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 8b4c444b..d8f3b6ba 100644 --- a/configure.ac +++ b/configure.ac @@ -176,6 +176,7 @@ AC_ARG_WITH(buildrules, AC_MSG_RESULT($BUILDRULES) AC_SUBST(WFLAGS) +AC_SUBST(CXXWFLAGS) qpdf_USE_EXTRA_WARNINGS=0 if test "$BUILDRULES" = "msvc"; then dnl /w14267 makes warning 4267 a level 1 warning. This warning reports @@ -197,6 +198,22 @@ if test "$qpdf_USE_EXTRA_WARNINGS" = "1"; then else AC_MSG_RESULT(no) fi +if test "$BUILDRULES" != "msvc"; then + qpdf_USE_EXTRA_WARNINGS=0 + try_flags="-Wold-style-cast" + AC_MSG_CHECKING(for whether $CXX supports $try_flags) + oCXXFLAGS=$CXXFLAGS + CXXFLAGS="$CXXFLAGS $try_flags" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int a = 1; int b = a; a = b;]])], + [qpdf_USE_EXTRA_WARNINGS=1],[qpdf_USE_EXTRA_WARNINGS=0]) + CXXFLAGS=$oCXXFLAGS + if test "$qpdf_USE_EXTRA_WARNINGS" = "1"; then + AC_MSG_RESULT(yes) + CXXWFLAGS="$try_flags" + else + AC_MSG_RESULT(no) + fi +fi if test "$BUILDRULES" = "msvc"; then try_flags="/WX" |