Fix timezone portability issue (fixes #515)

1 files changed, 72 insertions, 0 deletions

diff --git a/configure b/configure
index 55c59a92..daac3f5a 100755
--- a/configure
+++ b/configure
@@ -17830,6 +17830,78 @@ $as_echo "no" >&6; }
    fi
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for tm_gmtoff in struct tm" >&5
+$as_echo_n "checking for tm_gmtoff in struct tm... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+      #include <time.h>
+
+int
+main ()
+{
+
+      struct tm tm;
+      tm.tm_gmtoff = 1;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  qpdf_TM_GMTOFF=1
+else
+  qpdf_TM_GMTOFF=0
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+if test "$qpdf_TM_GMTOFF" = "1"; then
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_TM_GMTOFF 1" >>confdefs.h
+
+else
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for extern long timezone" >&5
+$as_echo_n "checking for extern long timezone... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+      #include <time.h>
+      #include <stdio.h>
+
+int
+main ()
+{
+
+      tzset();
+      printf("%ld\n", timezone);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  qpdf_EXTERN_LONG_TIMEZONE=1
+else
+  qpdf_EXTERN_LONG_TIMEZONE=0
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+if test "$qpdf_EXTERN_LONG_TIMEZONE" = "1"; then
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_EXTERN_LONG_TIMEZONE 1" >>confdefs.h
+
+else
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
 LL_FMT=""
 oCFLAGS=$CFLAGS
 CFLAGS="$WFLAGS $CFLAGS"