diff options
Diffstat (limited to 'dev-build/autoconf-vanilla/files/autoconf-2.71-AC_LANG_CALL_C_cxx.patch')
| -rw-r--r-- | dev-build/autoconf-vanilla/files/autoconf-2.71-AC_LANG_CALL_C_cxx.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/dev-build/autoconf-vanilla/files/autoconf-2.71-AC_LANG_CALL_C_cxx.patch b/dev-build/autoconf-vanilla/files/autoconf-2.71-AC_LANG_CALL_C_cxx.patch new file mode 100644 index 000000000000..5b53d17135bc --- /dev/null +++ b/dev-build/autoconf-vanilla/files/autoconf-2.71-AC_LANG_CALL_C_cxx.patch @@ -0,0 +1,35 @@ +https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=b27bc3e230bb12fdd9a813e38e82bc4c3e22b4cc + +Note: we drop the comma from the comment because some packages +have bad quoting, and while that will need to be sorted when/if +autoconf 2.72 is released, we've got our hands full with the +Clang situation right now (bug #871753). + +From b27bc3e230bb12fdd9a813e38e82bc4c3e22b4cc Mon Sep 17 00:00:00 2001 +From: Paul Eggert <eggert@cs.ucla.edu> +Date: Tue, 31 Aug 2021 16:30:46 -0700 +Subject: Port AC_LANG_CALL(C) to C++ +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +* lib/autoconf/c.m4 (AC_LANG_CALL(C)): Add an extern "C" if C++. +Problem reported by Vincent Lefèvre (sr #110532). +--- a/lib/autoconf/c.m4 ++++ b/lib/autoconf/c.m4 +@@ -126,7 +126,13 @@ m4_define([AC_LANG_CALL(C)], + m4_if([$2], [main], , + [/* Override any GCC internal prototype to avoid an error. + Use char because int might match the return type of a GCC +- builtin and then its argument prototype would still apply. */ ++ builtin and then its argument prototype would still apply. ++ The 'extern "C"' is for builds by C++ compilers; ++ although this is not generally supported in C code supporting it here ++ has little cost and some practical benefit (sr 110532). */ ++#ifdef __cplusplus ++extern "C" ++#endif + char $2 ();])], [return $2 ();])]) + + +cgit v1.1 |