File project.diff of Package mingw32-gmp

--- mingw32-gmp.spec.orig
+++ mingw32-gmp.spec
@@ -26,6 +26,7 @@ Url:            https://gmplib.org/
 Source:         https://gmplib.org/download/gmp/gmp-%{version}.tar.xz
 
 #!BuildIgnore: post-build-checks
+BuildRequires:  m4
 BuildRequires:  mingw32-cross-gcc
 BuildRequires:  mingw32-cross-gcc-c++
 BuildRequires:  xz