givaro: fix cross build

pkgs/development/libraries/givaro/default.nix

@@ -44,6 +44,8 @@ stdenv.mkDerivation rec {
       url = "https://github.com/linbox-team/givaro/commit/a18baf5227d4f3e81a50850fe98e0d954eaa3ddb.patch";
       hash = "sha256-IR0IHhCqbxgtsST30vxM9ak1nGtt0apxcLUQ1kS1DHw=";
     })
+    # skip gmp version check for cross-compiling, our version is new enough
+    ./skip-gmp-check.patch
   ];
 
   enableParallelBuilding = true;
@@ -59,6 +61,7 @@ stdenv.mkDerivation rec {
   configureFlags =
     [
       "--without-archnative"
+      "CCNAM=${stdenv.cc.cc.pname}"
     ]
     ++ lib.optionals stdenv.hostPlatform.isx86_64 [
       # disable SIMD instructions (which are enabled *when available* by default)

pkgs/development/libraries/givaro/skip-gmp-check.patch

@@ -0,0 +1,26 @@
+diff --git a/macros/gmp-check.m4 b/macros/gmp-check.m4
+index 72eba8c..25af64e 100644
+--- a/macros/gmp-check.m4
++++ b/macros/gmp-check.m4
+@@ -105,21 +105,6 @@ AC_DEFUN([GIV_CHECK_GMP], [
+ 		exit 1
+ 	])
+ 
+-	AC_MSG_CHECKING([whether gmp version is at least $min_gmp_release])
+-	AC_TRY_RUN(
+-		[ 
+-			#include <cstddef>
+-			#include <gmp.h>
+-			int main () {
+-				return (__GNU_MP_RELEASE < $min_gmp_release);
+-			}
+-		],
+-		[ AC_MSG_RESULT(yes)
+-		],
+-		[ AC_MSG_RESULT(no)
+-		  AC_MSG_ERROR(your GMP is too old. GMP release >= $min_gmp_release needed)
+-		  exit 1]
+-	)
+ 	AC_LANG_POP([C++])
+ 	
+ 	AC_SUBST(GMP_CFLAGS)