From 3182dfb02123ffe5708ea2dd232afa4701f11ddc Mon Sep 17 00:00:00 2001
From: Chris Mayo <aklhfex@gmail.com>
Date: Thu, 21 Mar 2019 19:53:37 +0000
Subject: Build: automatically enable system error messages

Define HAVE_STRERROR during configuration.

Before:
$ cs2cs +proj=latlong +to +proj=latlong dummy
<cs2cs>:
Sys errno: 2: <system mess. texts unavail.>
dummy

After:
$ cs2cs +proj=latlong +to +proj=latlong dummy
<cs2cs>:
Sys errno: 2: No such file or directory
dummy
---
 cmake/ProjConfig.cmake     | 3 ++-
 cmake/proj_config.cmake.in | 3 +++
 configure.ac               | 1 +
 src/apps/emess.cpp         | 1 +
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmake/ProjConfig.cmake b/cmake/ProjConfig.cmake
index ada827ea..cd5a635e 100644
--- a/cmake/ProjConfig.cmake
+++ b/cmake/ProjConfig.cmake
@@ -24,7 +24,8 @@ check_include_files (sys/types.h HAVE_SYS_TYPES_H)
 check_include_files (unistd.h HAVE_UNISTD_H)
 check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
 
-CHECK_FUNCTION_EXISTS(localeconv HAVE_LOCALECONV)
+check_function_exists(localeconv HAVE_LOCALECONV)
+check_function_exists(strerror HAVE_STRERROR)
 
 # check libm need on unix 
 check_library_exists(m ceil "" HAVE_LIBM) 
diff --git a/cmake/proj_config.cmake.in b/cmake/proj_config.cmake.in
index bbdf3249..caeb0934 100644
--- a/cmake/proj_config.cmake.in
+++ b/cmake/proj_config.cmake.in
@@ -22,6 +22,9 @@
 /* Define to 1 if you have the <stdlib.h> header file. */
 #cmakedefine HAVE_STDLIB_H 1
 
+/* Define to 1 if you have the `strerror' function. */
+#cmakedefine HAVE_STRERROR 1
+
 /* Define to 1 if you have the <strings.h> header file. */
 #cmakedefine HAVE_STRINGS_H 1
 
diff --git a/configure.ac b/configure.ac
index d0aecf75..f35c97fe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -219,6 +219,7 @@ CFLAGS="$save_CFLAGS $C99_MATH"
 AC_SEARCH_LIBS([sqrt], [m])
 
 AC_CHECK_FUNC(localeconv, [AC_DEFINE(HAVE_LOCALECONV,1,[Define to 1 if you have localeconv])])
+AC_CHECK_FUNCS([strerror])
 
 dnl ---------------------------------------------------------------------------
 dnl Check for JNI support.
diff --git a/src/apps/emess.cpp b/src/apps/emess.cpp
index 144e9e23..52f88aa3 100644
--- a/src/apps/emess.cpp
+++ b/src/apps/emess.cpp
@@ -20,6 +20,7 @@
 #include <string.h>
 
 #include "proj_api.h"
+#include "proj_config.h"
 #define EMESS_ROUTINE
 #include "emess.h"
 
-- 
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