commit ef91ddeae79497fac25545dd68ee55a5a3c60e8d
author Serhiy Storchaka <storchaka@gmail.com> Fri May 25 13:16:51 2018 +0300
committer GitHub <noreply@github.com> Fri May 25 13:16:51 2018 +0300
tree 0dc17d8800827ea6da651a993bb8204b1d462d37
parent 82d727fce68577d9f44f9ecfaf20bd4581a66404

bpo-33012: Add -Wno-cast-function-type for gcc 8. (GH-6757)

configure.ac

diff --git a/configure.ac b/configure.ac
index 5948904..11fc7e5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1660,6 +1660,26 @@
       CFLAGS_NODIST="$CFLAGS_NODIST -Wno-missing-field-initializers"
     fi
 
+    AC_MSG_CHECKING(if we can turn off $CC invalid function cast warning)
+     ac_save_cc="$CC"
+     CC="$CC -Wcast-function-type -Werror"
+     AC_CACHE_VAL(ac_cv_disable_cast_function_type,
+       AC_COMPILE_IFELSE(
+         [
+           AC_LANG_PROGRAM([[]], [[]])
+         ],[
+           ac_cv_disable_cast_function_type=yes
+         ],[
+           ac_cv_disable_cast_function_type=no
+         ]))
+     CC="$ac_save_cc"
+    AC_MSG_RESULT($ac_cv_disable_cast_function_type)
+
+    if test $ac_cv_disable_cast_function_type = yes
+    then
+      CFLAGS_NODIST="$CFLAGS_NODIST -Wno-cast-function-type"
+    fi
+
     AC_MSG_CHECKING(if we can turn on $CC mixed sign comparison warning)
      ac_save_cc="$CC"
      CC="$CC -Wsign-compare"