[PATCH] support XDG_CONFIG_HOME on macOS

[Jun T <tak...@kb...>]

macOS does not define __unix__ but it can support XDG_CONFIG_HOME.

I believe just checking for __APPLE__ is enough, but added a check for
__MACH__ since it is the method recommended by Apple (and used in m4/apple.m4).


diff --git a/src/plot.c b/src/plot.c
index 8e91239cf..f41a192b0 100644
--- a/src/plot.c
+++ b/src/plot.c
@@ -789,7 +789,7 @@ load_rcfile(int where)
 	PATH_CONCAT(rcfile, PLOTRC);
 	plotrc = fopen(rcfile, "r");
     } else if (where == 3) {
-#ifdef __unix__
+#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 	char * XDGConfigHome = xdg_get_var(kXDGConfigHome);
 	size_t len = strlen(XDGConfigHome);
 	rcfile = gp_alloc(len + 1 + sizeof("gnuplot/gnuplotrc"), "rcfile");
diff --git a/src/xdg.c b/src/xdg.c
index 93e4c227d..985dc77d4 100644
--- a/src/xdg.c
+++ b/src/xdg.c
@@ -2,7 +2,7 @@
 #include "plot.h"
 #include "util.h"
 
-#ifdef __unix__
+#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 
 #include <assert.h>
 #include <stdio.h>
@@ -57,4 +57,4 @@ char *xdg_get_var(const XDGVarType idx) {
     return XDGVar;
 }
 
-#endif /* __unix__ */
+#endif /* __unix__ || macOS */
diff --git a/src/xdg.h b/src/xdg.h
index acfdda19d..8460edfa0 100644
--- a/src/xdg.h
+++ b/src/xdg.h
@@ -1,7 +1,7 @@
 #ifndef GNUPLOT_XDG_H
 #define GNUPLOT_XDG_H
 
-#ifdef __unix__
+#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 
 /* List of possible XDG variables */
 typedef enum {
@@ -16,7 +16,7 @@ typedef enum {
 
 char *xdg_get_var(const XDGVarType idx);
 
-#endif /* __unix__ */
+#endif /* __unix__ || macOS */
 
 #endif /* GNUPLOT_XDG_H */