Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

65 lines (61 sloc) 2.431 kb
# Heavily modified, to try without any added includes first, and to set a
# HEADER_H_CPPFLAGS variable (for a file called header.h) instead of modifying
# CFLAGS/CPPFLAGS directly.
# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_ext_check_header.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_EXT_CHECK_HEADER(<header>, <paths>).
#
# DESCRIPTION
#
# Check for <header> with -I<path> for each path in <paths> if need be.
# The first sucecssful path is chosen (eg if you say
# AX_EXT_CHECK_HEADER(foo.h, bar baz qux) and -Ibaz works then -Iqux will
# not be tested.
#
# Any -I flags that locate a header are added to CFLAGS and CPPFLAGS. AS
# with AC_CHECK_HEADERS it causes HAVE_<header>_H to be defined as 1.
#
# Example:
#
# AX_EXT_HAVE_HEADER(openssl/rsa.h, /usr/local/include /usr/local/ssl/include /usr/local/openssl/include)
#
# LICENSE
#
# Copyright (c) 2008 Duncan Simpson <dps@simpson.demon.co.uk>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 7
AC_DEFUN([AX_EXT_HAVE_HEADER],
[AC_LANG_PUSH(C)
got="no"
hdr=`echo $1 | $as_tr_sh`
AC_CACHE_CHECK([for $1], [ext_cv_hashdr_${hdr}],
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <$1>])], [got="yes"], [got="no"]))
if test "x$got" = "xyes"; then
hdr=`echo $1 | $as_tr_cpp`
eval ${hdr}_CPPFLAGS=""
fi
for dir in $2; do
if test "x${got}" = "xno"; then
ext_hashdr_cvdir=`echo $dir | $as_tr_sh`
AC_CACHE_CHECK([for $1 with -I$dir], [ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}],
[ext_have_hdr_save_cflags=${CFLAGS} CFLAGS="${CFLAGS} -I${dir}"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <$1>])],
[got="yes"; eval "ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}"="yes"],
[got="no"; eval "ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}"="no"])
CFLAGS=$ext_have_hdr_save_cflags])
if eval `echo 'test x${'ext_cv${ext_hashdr_cvdir}_hashdr_${hdr}'}' = "xyes"`; then
got="yes";
hdr=`echo $1 | $as_tr_cpp`
eval ${hdr}_CPPFLAGS=-I${dir}
fi
fi
done
AC_LANG_POP])
Jump to Line
Something went wrong with that request. Please try again.