Fix FTBFS.

common.patch

@@ -0,0 +1,11 @@
+--- CMakeLists.txt~	2019-09-25 15:43:34.000000000 -0500
++++ CMakeLists.txt	2020-01-31 09:26:24.104743210 -0600
+@@ -302,7 +302,7 @@
+ ENDIF()
+ 
+ IF(CMAKE_COMPILER_IS_GNUCC)
+-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
++  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -fcommon")
+   IF(NOT(ANDROID OR BLACKBERRY OR FREEGLUT_WAYLAND))
+     # not setting -ansi as EGL/KHR headers doesn't support it
+     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pedantic")

freeglut.spec

@@ -1,11 +1,12 @@
 Summary:        A freely licensed alternative to the GLUT library
 Name:           freeglut
 Version:        3.2.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 URL:            http://freeglut.sourceforge.net
 Source0:        https://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.gz
 # For the manpages
 Source1:        https://downloads.sourceforge.net/openglut/openglut-0.6.3-doc.tar.gz
+Patch0:         common.patch
 License:        MIT
 
 BuildRequires:  gcc
@@ -49,6 +50,7 @@ license.
 
 %prep
 %setup -q -a 1
+%patch0 -p0
 
 %build
 %{cmake} -DFREEGLUT_BUILD_STATIC_LIBS=OFF .
@@ -78,6 +80,9 @@ install -p -m 644 doc/man/*.3 $RPM_BUILD_ROOT/%{_mandir}/man3
 %{_libdir}/cmake/FreeGLUT/*
 
 %changelog
+* Fri Jan 31 2020 Gwyn Ciesla <gwync@protonmail.com> - 3.2.1-3
+- Fix FTBFS
+
 * Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.2.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild