From 1c2f375033afb0a4eb57c978222db2feeb148f43 Mon Sep 17 00:00:00 2001
From: Charles Karney <charles.karney@sri.com>
Date: Thu, 19 Sep 2019 09:25:09 -0400
Subject: Require C99 compiler see #1621

cmake and autoconf now stipulate C99
change c89 to c99 in travis jobs
remove HAVE_C99_MATH checks

(unrelated) relax Visual Studio compatibility check in
cmake/project-config-version.cmake.in (VS 2019 can use a VS 2015 library
but not vice versa).
---
 src/geodesic.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/geodesic.c')

diff --git a/src/geodesic.c b/src/geodesic.c
index 49c9823e..dcdd4d77 100644
--- a/src/geodesic.c
+++ b/src/geodesic.c
@@ -27,8 +27,13 @@
 #include <math.h>
 
 #if !defined(HAVE_C99_MATH)
+#if defined(PROJ_LIB)
+/* PROJ requires C99 so HAVE_C99_MATH is implicit */
+#define HAVE_C99_MATH 1
+#else
 #define HAVE_C99_MATH 0
 #endif
+#endif
 
 #if !defined(__cplusplus)
 #define nullptr 0
-- 
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