[gnumeric] Compilation: test for features, not OSs.

[Morten Welinder <mortenw src gnome org>]

commit 4a202c918acc0f3407b28f857c19fca9e463eabc
Author: Morten Welinder <terra gnome org>
Date:   Mon Dec 22 12:32:35 2014 -0500

    Compilation: test for features, not OSs.

 configure.ac      |    2 +-
 src/libgnumeric.c |    6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 605c348..80e3662 100644
--- a/configure.ac
+++ b/configure.ac
@@ -563,7 +563,7 @@ unset SAVE_LIBS
 AC_HEADER_SYS_WAIT
 
 dnl Check for some functions
-AC_CHECK_FUNCS(uname)
+AC_CHECK_FUNCS(uname setenv putenv)
 
 dnl FIXME: Does this really belong here?
 AC_CHECK_FUNC(bind_textdomain_codeset,,[AC_CHECK_LIB(intl,bind_textdomain_codeset)])
diff --git a/src/libgnumeric.c b/src/libgnumeric.c
index 26dadd0..feebeb1 100644
--- a/src/libgnumeric.c
+++ b/src/libgnumeric.c
@@ -183,10 +183,12 @@ gnm_pre_parse_init (int argc, gchar const **argv)
 
        /* Default value is bogus, see 732184.  */
        if (!getenv ("G_ENABLE_DIAGNOSTIC")) {
-#ifdef WIN32
+#ifdef HAVE_SETENV
+               setenv ("G_ENABLE_DIAGNOSTIC", "0", FALSE);
+#elif defined(HAVE_PUTENV)
                putenv ("G_ENABLE_DIAGNOSTIC=0");
 #else
-               setenv ("G_ENABLE_DIAGNOSTIC", "0", FALSE);
+               /* No big deal.  */
 #endif
        }