Backport upstream commit to improve C99 compatibility

Related to:

  <https://fedoraproject.org/wiki/Changes/PortingToModernC>
  <https://fedoraproject.org/wiki/Toolchain/PortingToModernC>

libvpx-configure-c99.patch

@@ -0,0 +1,17 @@
+Add missing types to the inline keyword check, otherwise the check
+might fail incorrectly with strict C99 compilers which do not support
+implicit int.
+
+diff --git a/build/make/configure.sh b/build/make/configure.sh
+index 79e6f59c2df38d38..4f8dc59b7ee0290b 100644
+--- a/build/make/configure.sh
++++ b/build/make/configure.sh
+@@ -1511,7 +1511,7 @@ EOF
+ 
+     # Try to find which inline keywords are supported
+     check_cc <<EOF && INLINE="inline"
+-static inline function() {}
++static inline void function(void) {}
+ EOF
+ 
+   # Almost every platform uses pthreads.

libvpx.spec

@@ -6,7 +6,7 @@
 Name:			libvpx
 Summary:		VP8/VP9 Video Codec SDK
 Version:		1.12.0
-Release:		1%{?dist}
+Release:		2%{?dist}
 License:		BSD
 Source0:		https://github.com/webmproject/libvpx/archive/v%{version}.tar.gz
 Source1:		vpx_config.h
@@ -22,6 +22,7 @@ BuildRequires:		yasm
 BuildRequires:		doxygen, php-cli, perl(Getopt::Long)
 # Do not disable FORTIFY_SOURCE=2
 Patch0:			libvpx-1.7.0-leave-fortify-source-on.patch
+Patch1: libvpx-configure-c99.patch
 
 %description
 libvpx provides the VP8/VP9 SDK, which allows you to integrate your applications 
@@ -47,6 +48,7 @@ and decoder.
 %prep
 %setup -q -n libvpx-%{version}
 %patch0 -p1 -b .leave-fs-on
+%patch1 -p1
 
 %build
 
@@ -233,6 +235,9 @@ rm -rf %{buildroot}%{_prefix}/src
 %{_bindir}/*
 
 %changelog
+* Tue Dec  6 2022 Florian Weimer <fweimer@redhat.com> - 1.12.0-2
+- Backport upstream commit to improve C99 compatibility
+
 * Wed Aug 17 2022 Pete Walter <pwalter@fedoraproject.org> - 1.12.0-1
 - Update to 1.12.0