gmp: use assembly in static library

Closes #25470.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/gmp.rb

@@ -4,7 +4,7 @@ class Gmp < Formula
   url "https://gmplib.org/download/gmp/gmp-6.1.2.tar.xz"
   mirror "https://ftp.gnu.org/gnu/gmp/gmp-6.1.2.tar.xz"
   sha256 "87b565e89a9a684fe4ebeeddb8399dce2599f9c9049854ca8c0dfbdea0e21912"
-  revision 1
+  revision 2
 
   bottle do
     cellar :any
@@ -14,16 +14,13 @@ class Gmp < Formula
   end
 
   def install
-    args = %W[--prefix=#{prefix} --enable-cxx]
+    # Enable --with-pic to avoid linking issues with the static library
+    args = %W[--prefix=#{prefix} --enable-cxx --with-pic]
     args << "--build=core2-apple-darwin#{`uname -r`.to_i}" if build.bottle?
-    system "./configure", "--disable-static", *args
+    system "./configure", *args
     system "make"
     system "make", "check"
     system "make", "install"
-    system "make", "clean"
-    system "./configure", "--disable-shared", "--disable-assembly", *args
-    system "make"
-    lib.install Dir[".libs/*.a"]
   end
 
   test do
@@ -41,7 +38,12 @@ class Gmp < Formula
         return 0;
       }
     EOS
+
     system ENV.cc, "test.c", "-L#{lib}", "-lgmp", "-o", "test"
     system "./test"
+
+    # Test the static library to catch potential linking issues
+    system ENV.cc, "test.c", "#{lib}/libgmp.a", "-o", "test"
+    system "./test"
   end
 end