From f536f0053913f5c9407e734e3c6cb5af8897ace1 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sun, 25 Sep 2005 22:34:03 +0000
Subject: [PATCH] don't declare strptime() ourselves if the system already does
 it, we might have a slightly different declaration and this causes problems

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35699 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 configure               | 83 +++++++++++++++++++++++++++++++++++++++++
 configure.in            | 27 +++++++++++++-
 src/common/datetime.cpp |  6 +--
 3 files changed, 111 insertions(+), 5 deletions(-)

diff --git a/configure b/configure
index dcfac727bb..b4a3a93efa 100755
--- a/configure
+++ b/configure
@@ -38965,6 +38965,89 @@ _ACEOF
 fi
 done
 
+    if test "$ac_cv_func_strptime" = "yes"; then
+        echo "$as_me:$LINENO: checking for strptime declaration" >&5
+echo $ECHO_N "checking for strptime declaration... $ECHO_C" >&6
+if test "${wx_cv_func_strptime_decl+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+
+
+                ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+                cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+                        #include <time.h>
+
+int
+main ()
+{
+
+                        struct tm t;
+                        strptime("foo", "bar", &t);
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  wx_cv_func_strptime_decl=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+wx_cv_func_strptime_decl=no
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+                ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+fi
+echo "$as_me:$LINENO: result: $wx_cv_func_strptime_decl" >&5
+echo "${ECHO_T}$wx_cv_func_strptime_decl" >&6
+    fi
+    if test "$wx_cv_func_strptime_decl" = "yes"; then
+        cat >>confdefs.h <<\_ACEOF
+#define HAVE_STRPTIME_DECL 1
+_ACEOF
+
+    fi
 
             echo "$as_me:$LINENO: checking for timezone variable in <time.h>" >&5
 echo $ECHO_N "checking for timezone variable in <time.h>... $ECHO_C" >&6
diff --git a/configure.in b/configure.in
index 905f546f7c..1f9311a28d 100644
--- a/configure.in
+++ b/configure.in
@@ -5436,11 +5436,34 @@ fi
 
 dnl ---------------------------------------------------------------------------
 dnl time/date functions
-dnl ------------------------------------------------------------------------
+dnl ---------------------------------------------------------------------------
 
 if test "$wxUSE_DATETIME" = "yes"; then
-    dnl check for strptime
+    dnl check for strptime and for its declaration as some systems lack it
     AC_CHECK_FUNCS(strptime)
+    if test "$ac_cv_func_strptime" = "yes"; then
+        AC_CACHE_CHECK([for strptime declaration], wx_cv_func_strptime_decl,
+            [
+                AC_LANG_SAVE
+                AC_LANG_CPLUSPLUS
+                AC_TRY_COMPILE(
+                    [
+                        #include <time.h>
+                    ],
+                    [
+                        struct tm t;
+                        strptime("foo", "bar", &t);
+                    ],
+                    wx_cv_func_strptime_decl=yes,
+                    wx_cv_func_strptime_decl=no
+                )
+                AC_LANG_RESTORE
+            ]
+        )
+    fi
+    if test "$wx_cv_func_strptime_decl" = "yes"; then
+        AC_DEFINE(HAVE_STRPTIME_DECL)
+    fi
 
     dnl check for timezone variable
     dnl   doesn't exist under Darwin / Mac OS X which uses tm_gmtoff instead
diff --git a/src/common/datetime.cpp b/src/common/datetime.cpp
index 6622496e33..e00d14f757 100644
--- a/src/common/datetime.cpp
+++ b/src/common/datetime.cpp
@@ -392,9 +392,9 @@ static wxString CallStrftime(const wxChar *format, const tm* tm)
 
 #ifdef HAVE_STRPTIME
 
-// glibc2 doesn't define this in the headers unless _XOPEN_SOURCE is defined
-// which, unfortunately, wreaks havoc elsewhere
-#if defined(__GLIBC__) && (__GLIBC__ == 2)
+#if wxUSE_UNIX && !defined(HAVE_STRPTIME_DECL)
+    // configure detected that we had strptime() but not its declaration,
+    // provide it ourselves
     extern "C" char *strptime(const char *, const char *, struct tm *);
 #endif
 
-- 
2.45.2