igraph-musl-fix.patch

--- igraph-0.7.1/src/f2c/arithchk.c
+++ igraph-0.7.1-patched/src/f2c/arithchk.c
@@ -110,8 +110,19 @@
 	return 0;
 	}
 
-char *emptyfmt = "";	/* avoid possible warning message with printf("") */
+/* avoid possible warning message with printf("") */
+const char *const emptyfmt = "";
 
+#ifdef __GNUC__
+#  pragma GCC diagnostic push
+#  ifndef __clang__
+#    pragma GCC diagnostic ignored "-Wformat-security"
+#    pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#  else
+#    pragma GCC diagnostic ignored "-Wformat-zero-length"
+#  endif
+#endif
+
  static Akind *
 ccheck(void)
 {
@@ -165,6 +176,12 @@
 	t = sqrt(t_nan);
 	return errno == 0;
 	}
+
+#ifdef __GNUC__
+#  ifndef __clang__
+#    pragma GCC diagnostic pop
+#  endif
+#endif
 
  void
 get_nanbits(unsigned int *b, int k)
--- igraph-0.7.1/src/f2c/sysdep1.h
+++ igraph-0.7.1-patched/src/f2c/sysdep1.h
@@ -15,8 +15,13 @@
 
 #ifdef __linux__
 #define USE_LARGEFILE
+
+#ifdef __GLIBC__
 #define OFF_T __off64_t
-#endif
+#else
+#define OFF_T off64_t
+#endif /* __GLIBC__ */
+#endif /* __linux__ */
 
 #ifdef _AIX43
 #define _LARGE_FILES
--- igraph-0.7.1/src/f2c/uninit.c
+++ igraph-0.7.1-patched/src/f2c/uninit.c
@@ -250,9 +250,11 @@
  */
 
 
-#if (defined(__GLIBC__)&& ( __GLIBC__>=2) && (__GLIBC_MINOR__>=2) )
-#define _GNU_SOURCE 1
+#ifdef __GLIBC__
 #define IEEE0_done
+
+#if ((__GLIBC__>=2) && (__GLIBC_MINOR__>=2))
+#define _GNU_SOURCE 1
 #include <fenv.h>
  static void
   ieee0(Void)
@@ -265,14 +267,11 @@
          unsupported_error();
 }
 
-#endif /* Glibc control */
-
 /* Many linux cases will be treated through GLIBC.  Note that modern
  * linux runs on many non-i86 plaforms and as a result the following code
  * must be processor dependent rather than simply OS specific */
 
-#if (defined(__linux__)&&(!defined(IEEE0_done)))
-#define IEEE0_done
+#else /* __GLIBC__<2.2 */
 #include <fpu_control.h>
 
 
@@ -401,7 +400,8 @@
 
 #endif /* _FPU_IEEE */
 	}
-#endif /* __linux__ */
+#endif /* __GLIBC__>2.2 */
+#endif /* __GLIBC__ */
 
 /* Specific to OSF/1 */
 #if (defined(__alpha)&&defined(__osf__))