build/pkgs/mpc/spkg-configure.m4: Check for version using AC_LINK_IFELSE

sagemath · Dec 14, 2023 · a664359 · a664359
1 parent 97d02ee
commit a664359
Showing 1 changed file with 11 additions and 3 deletions.
diff --git a/build/pkgs/mpc/spkg-configure.m4 b/build/pkgs/mpc/spkg-configure.m4
@@ -1,9 +1,17 @@
 SAGE_SPKG_CONFIGURE([mpc], [
     SAGE_SPKG_DEPCHECK([mpfr], [
-        AC_CHECK_HEADER(mpc.h, [], [sage_spkg_install_mpc=yes])
         dnl gmpy2 2.2 needs MPC >= 1.2.1 according https://github.com/aleaxit/gmpy/blob/master/src/gmpy2.h#L86
-        dnl mpc_sum was added in MPC 1.2.0 according to https://www.multiprecision.org/mpc/olds.html
-        AC_SEARCH_LIBS([mpc_sum], [mpc], [], [sage_spkg_install_mpc=yes])
+        AC_MSG_CHECKING([for MPC >= 1.2.1])
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <mpc.h>]], [[
+#if (!defined(MPC_VERSION) || (MPC_VERSION < MPC_VERSION_NUM(1,2,1)))
+#  error "Sage requires MPC 1.2.1 or later (for gmpy2 2.2)."
+#endif
+        ]])], [
+            AC_MSG_RESULT([yes])
+        ], [
+            AC_MSG_RESULT([no])
+            sage_spkg_install_mpc=yes
+        ])
     ])
 ], [], [], [
     if test x$sage_spkg_install_mpc = xyes; then