improve detection of gmtime_r() and strtoll()

1 files changed, 273 insertions, 0 deletions

diff --git a/m4/curl-functions.m4 b/m4/curl-functions.m4
new file mode 100644
index 000000000..abe52a0cd
--- /dev/null
+++ b/m4/curl-functions.m4
@@ -0,0 +1,273 @@
+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at http://curl.haxx.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+# $Id$
+#***************************************************************************
+
+# File version for 'aclocal' use. Keep it a single number.
+# serial 1
+
+
+dnl CURL_INCLUDES_STDLIB
+dnl -------------------------------------------------
+dnl Set up variable with list of headers that must be
+dnl included when stdlib.h is to be included.
+
+AC_DEFUN([CURL_INCLUDES_STDLIB], [
+curl_includes_stdlib="\
+/* includes start */
+#ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+#endif
+/* includes end */"
+  AC_CHECK_HEADERS(
+    sys/types.h stdlib.h,
+    [], [], [$curl_includes_stdlib])
+])
+
+
+dnl CURL_INCLUDES_TIME
+dnl -------------------------------------------------
+dnl Set up variable with list of headers that must be
+dnl included when time.h is to be included.
+
+AC_DEFUN([CURL_INCLUDES_TIME], [
+AC_REQUIRE([AC_HEADER_TIME])dnl
+curl_includes_time="\
+/* includes start */
+#ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#  include <sys/time.h>
+#  ifdef TIME_WITH_SYS_TIME
+#    include <time.h>
+#  endif
+#else
+#  ifdef HAVE_TIME_H
+#    include <time.h>
+#  endif
+#endif
+/* includes end */"
+  AC_CHECK_HEADERS(
+    sys/types.h sys/time.h time.h,
+    [], [], [$curl_includes_time])
+])
+
+
+dnl CURL_CHECK_FUNC_GMTIME_R
+dnl -------------------------------------------------
+dnl Verify if gmtime_r is available, prototyped, can
+dnl be compiled and seems to work. If all of these are
+dnl true, and usage has not been previously disallowed
+dnl with shell variable curl_disallow_gmtime_r, then
+dnl HAVE_GMTIME_R will be defined.
+
+AC_DEFUN([CURL_CHECK_FUNC_GMTIME_R], [
+  AC_REQUIRE([CURL_INCLUDES_TIME])dnl
+  #
+  tst_links_gmtime_r="unknown"
+  tst_proto_gmtime_r="unknown"
+  tst_compi_gmtime_r="unknown"
+  tst_works_gmtime_r="unknown"
+  tst_allow_gmtime_r="unknown"
+  #
+  AC_MSG_CHECKING([if gmtime_r can be linked])
+  AC_LINK_IFELSE([
+    AC_LANG_FUNC_LINK_TRY([gmtime_r])
+  ],[
+    AC_MSG_RESULT([yes])
+    tst_links_gmtime_r="yes"
+  ],[
+    AC_MSG_RESULT([no])
+    tst_links_gmtime_r="no"
+  ])
+  #
+  if test "$tst_links_gmtime_r" = "yes"; then
+    AC_MSG_CHECKING([if gmtime_r is prototyped])
+    AC_EGREP_CPP([gmtime_r],[
+      $curl_includes_time
+    ],[
+      AC_MSG_RESULT([yes])
+      tst_proto_gmtime_r="yes"
+    ],[
+      AC_MSG_RESULT([no])
+      tst_proto_gmtime_r="no"
+    ])
+  fi
+  #
+  if test "$tst_proto_gmtime_r" = "yes"; then
+    AC_MSG_CHECKING([if gmtime_r is compilable])
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([[
+        $curl_includes_time
+      ]],[[
+        gmtime_r(0, 0);
+      ]])
+    ],[
+      AC_MSG_RESULT([yes])
+      tst_compi_gmtime_r="yes"
+    ],[
+      AC_MSG_RESULT([no])
+      tst_compi_gmtime_r="no"
+    ])
+  fi
+  #
+  dnl only do runtime verification when not cross-compiling
+  if test "x$cross_compiling" != "xyes" &&
+    test "$tst_compi_gmtime_r" = "yes"; then
+    AC_MSG_CHECKING([if gmtime_r seems to work])
+    AC_RUN_IFELSE([
+      AC_LANG_PROGRAM([[
+        $curl_includes_time
+      ]],[[
+        time_t local = 1170352587;
+        struct tm *gmt = 0;
+        struct tm result;
+        gmt = gmtime_r(&local, &result);
+        if(gmt)
+          exit(0);
+        else
+          exit(1);
+      ]])
+    ],[
+      AC_MSG_RESULT([yes])
+      tst_works_gmtime_r="yes"
+    ],[
+      AC_MSG_RESULT([no])
+      tst_works_gmtime_r="no"
+    ])
+  fi
+  #
+  if test "$tst_works_gmtime_r" != "no"; then
+    AC_MSG_CHECKING([if gmtime_r usage allowed])
+    if test "x$curl_disallow_gmtime_r" != "xyes"; then
+      AC_MSG_RESULT([yes])
+      tst_allow_gmtime_r="yes"
+    else
+      AC_MSG_RESULT([no])
+      tst_allow_gmtime_r="no"
+    fi
+  fi
+  #
+  AC_MSG_CHECKING([if gmtime_r might be used])
+  if test "$tst_links_gmtime_r" = "yes" &&
+     test "$tst_proto_gmtime_r" = "yes" &&
+     test "$tst_compi_gmtime_r" = "yes" &&
+     test "$tst_allow_gmtime_r" = "yes" &&
+     test "$tst_works_gmtime_r" != "no"; then
+    AC_MSG_RESULT([yes])
+    AC_DEFINE_UNQUOTED(HAVE_GMTIME_R, 1,
+      [Define to 1 if you have a working gmtime_r function.])
+    ac_cv_func_gmtime_r="yes"
+  else
+    AC_MSG_RESULT([no])
+    ac_cv_func_gmtime_r="no"
+  fi
+])
+
+
+dnl CURL_CHECK_FUNC_STRTOLL
+dnl -------------------------------------------------
+dnl Verify if strtoll is available, prototyped, and
+dnl can be compiled. If all of these are true, and
+dnl usage has not been previously disallowed with
+dnl shell variable curl_disallow_strtoll, then
+dnl HAVE_STRTOLL will be defined.
+
+AC_DEFUN([CURL_CHECK_FUNC_STRTOLL], [
+  AC_REQUIRE([CURL_INCLUDES_STDLIB])dnl
+  #
+  tst_links_strtoll="unknown"
+  tst_proto_strtoll="unknown"
+  tst_compi_strtoll="unknown"
+  tst_allow_strtoll="unknown"
+  #
+  AC_MSG_CHECKING([if strtoll can be linked])
+  AC_LINK_IFELSE([
+    AC_LANG_FUNC_LINK_TRY([strtoll])
+  ],[
+    AC_MSG_RESULT([yes])
+    tst_links_strtoll="yes"
+  ],[
+    AC_MSG_RESULT([no])
+    tst_links_strtoll="no"
+  ])
+  #
+  if test "$tst_links_strtoll" = "yes"; then
+    AC_MSG_CHECKING([if strtoll is prototyped])
+    AC_EGREP_CPP([strtoll],[
+      $curl_includes_stdlib
+    ],[
+      AC_MSG_RESULT([yes])
+      tst_proto_strtoll="yes"
+    ],[
+      AC_MSG_RESULT([no])
+      tst_proto_strtoll="no"
+    ])
+  fi
+  #
+  if test "$tst_proto_strtoll" = "yes"; then
+    AC_MSG_CHECKING([if strtoll is compilable])
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([[
+        $curl_includes_stdlib
+      ]],[[
+        strtoll(0, 0, 0);
+      ]])
+    ],[
+      AC_MSG_RESULT([yes])
+      tst_compi_strtoll="yes"
+    ],[
+      AC_MSG_RESULT([no])
+      tst_compi_strtoll="no"
+    ])
+  fi
+  #
+  if test "$tst_compi_strtoll" = "yes"; then
+    AC_MSG_CHECKING([if strtoll usage allowed])
+    if test "x$curl_disallow_strtoll" != "xyes"; then
+      AC_MSG_RESULT([yes])
+      tst_allow_strtoll="yes"
+    else
+      AC_MSG_RESULT([no])
+      tst_allow_strtoll="no"
+    fi
+  fi
+  #
+  AC_MSG_CHECKING([if strtoll might be used])
+  if test "$tst_links_strtoll" = "yes" &&
+     test "$tst_proto_strtoll" = "yes" &&
+     test "$tst_compi_strtoll" = "yes" &&
+     test "$tst_allow_strtoll" = "yes"; then
+    AC_MSG_RESULT([yes])
+    AC_DEFINE_UNQUOTED(HAVE_STRTOLL, 1,
+      [Define to 1 if you have the strtoll function.])
+    ac_cv_func_strtoll="yes"
+  else
+    AC_MSG_RESULT([no])
+    ac_cv_func_strtoll="no"
+  fi
+])
+
+