From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Sun, 16 Jan 2022 16:10:59 +0000 (+0100)
Subject: sparse: add a graphviz_exit function to general.h if STANDALONE
X-Git-Tag: 3.0.0~50^2~11
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=325fc2ae5b6b106595b87cd354a1539ef931b60c;p=graphviz

sparse: add a graphviz_exit function to general.h if STANDALONE

An previous commit added the same function to cgraph/exit.h, but that
library is not supposed to be used when STANDALONE is defined.

Towards https://gitlab.com/graphviz/graphviz/-/issues/2178.
---

diff --git a/lib/sparse/general.h b/lib/sparse/general.h
index f2b0d3fdd..f481e33e7 100644
--- a/lib/sparse/general.h
+++ b/lib/sparse/general.h
@@ -65,6 +65,26 @@ __declspec(dllimport) extern unsigned char Verbose;
 extern unsigned char Verbose;
 #endif
 
+#ifdef __GNUC__
+// FIXME: use _Noreturn for all compilers when we move to C11
+#define NORETURN __attribute__((noreturn))
+#elif defined(_MSC_VER)
+#define NORETURN __declspec(noreturn)
+#else
+#define NORETURN /* nothing */
+#endif
+
+static inline NORETURN void graphviz_exit(int status) {
+#ifdef __MINGW32__
+  // workaround for https://gitlab.com/graphviz/graphviz/-/issues/2178
+  fflush(stdout);
+  fflush(stderr);
+#endif
+  exit(status);
+}
+
+#undef NORETURN
+
 #else  /* STANDALONE */
 #define CALLOC gcalloc
 #define MALLOC gmalloc