[patch] configure patch for musl ieee math

dia-0.97.3-fix-detection-of-isinf.patch (text/plain), 1.58 KB, created by Steve Arnold on 2018-03-25 23:41:00 UTC

--- a/configure.in	2018-03-24 15:04:26.707264129 -0700
+++ b/configure.in	2018-03-24 15:06:03.580596527 -0700
@@ -399,24 +399,23 @@
 dnl Sun Forte C provides isinf() in the unbundled -lsunmath. Solaris
 dnl declares finite() in ieeefp.h. It's preferrable not to link 
 dnl to -lsunmath as it's not present on all machines.
-have_isinf=no
-AC_CHECK_HEADERS(math.h,
-        AC_CHECK_LIB(m,isinf,
-                have_isinf=yes))
 
-if test "$have_isinf" = "no"; then
-    AC_CHECK_HEADER(ieeefp.h,
-             [AC_CHECK_FUNC(finite, 
-	               AC_DEFINE(HAVE_IEEEFP_H,1,
-		                 [Define if finite() is defined in ieeefp.h]),
-                       AC_MSG_ERROR([Can't find a definition of neither 
-                                     finite nor isinf]))],
-             [AC_MSG_ERROR(Can't find neither a definition of
-	                   isinf nor ieeefp.h)])
-else
-    AC_DEFINE([HAVE_ISINF], 1, 
-              [Define if the isinf() function is available])
+AC_MSG_CHECKING([for isnan])
+AC_TRY_LINK([#include <math.h>
+], [if (!isnan(3.14159)) isnan(2.7183);], ok=yes, ok=no)
+if test "$ok" = "yes"; then
+	AC_DEFINE(HAVE_ISNAN,1,[Define if the isnan() function/macro is available.])
 fi
+AC_MSG_RESULT(${ok})
+
+AC_MSG_CHECKING([for isinf])
+AC_TRY_LINK([#include <math.h>
+], [if (!isinf(3.14159)) isinf(2.7183);], ok=yes, ok=no)
+if test "$ok" = "yes"; then
+	AC_DEFINE(HAVE_ISINF,1,[Define if the isinf() function/macro is available.])
+fi
+AC_MSG_RESULT(${ok})
+
 
 dnl Alpha needs -mieee or we get a segfault
 dnl This shouldn't be needed but is here until a real solution is found