AC_PREREQ(2.59)

m4_include([version.m4])
AC_INIT([gssproxy],
        VERSION_NUMBER,
        [simo@redhat.com])

m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
    [AC_USE_SYSTEM_EXTENSIONS],
    [AC_GNU_SOURCE])

AC_PROG_CC_C99
CFLAGS="$CFLAGS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"

AC_CONFIG_SRCDIR([BUILD.txt])

AM_INIT_AUTOMAKE([-Wall foreign subdir-objects tar-pax])
AM_PROG_CC_C_O
AM_PROG_AR
AC_PROG_INSTALL
LT_INIT([disable-static])
AC_CONFIG_MACRO_DIR([m4])
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION([0.14])

AC_SUBST([PRERELEASE_VERSION],
         PRERELEASE_VERSION_NUMBER)

AC_DEFINE([PRERELEASE_VERSION], "PRERELEASE_VERSION_NUMBER",
          [Prerelease version number of package])

AM_CONDITIONAL([GIT_CHECKOUT], [git log -1 &>/dev/null])

m4_pattern_allow([AM_SILENT_RULES])
AM_SILENT_RULES

AM_CONDITIONAL([HAVE_GCC], [test "$ac_cv_prog_gcc" = yes])

AC_CHECK_HEADERS(stdint.h dlfcn.h)
AC_CONFIG_HEADER(config.h)

AC_CHECK_TYPES([errno_t], [], [], [[#include <errno.h>]])

m4_include([build_macros.m4])
BUILD_WITH_SHARED_BUILD_DIR

AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM([[#include <pthread.h>]],
        [[pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;]])],
    [AC_DEFINE([HAVE_PTHREAD], [1], [Pthread mutexes available.])],
    [AC_MSG_WARN([Pthread library not found! Clients will not be thread safe...])])

m4_include([external/platform.m4])

m4_include(conf_macros.m4)
WITH_DISTRO_VERSION
WITH_CC_PATH
WITH_LOG_PATH
WITH_PUBCONF_PATH
WITH_SOCKET_NAME
WITH_PID_FILE
WITH_TEST_DIR
WITH_MANPAGES
WITH_XML_CATALOG
WITH_SELINUX
WITH_GSSIDEBUG
WITH_GPSTATE_PATH
WITH_GPP_DEFAULT_BEHAVIOR
WITH_HARDENING

m4_include([external/pkg.m4])
m4_include([external/libpopt.m4])
m4_include([external/docbook.m4])
m4_include([external/sizes.m4])
m4_include([external/selinux.m4])
m4_include([external/libkeyutils.m4])
m4_include([external/systemd.m4])
m4_include([external/ax_pthread.m4])

PKG_CHECK_MODULES([VERTO], [libverto >= 0.2.2], [have_libverto=1], [have_libverto=])
if test x$have_libverto = x; then
    AC_MSG_ERROR([Could not find VERTO headers])
fi

AC_CHECK_LIB(verto, verto_free,,
             AC_MSG_ERROR(["Error: libverto is not found or lacks verto_free"]))

AC_CHECK_FUNCS(verto_cleanup,,
             AC_MSG_WARN(["Warning: libverto lacks verto_cleanup function"]))

#Check for libini_config
PKG_CHECK_MODULES([LIBINI_CONFIG], [ini_config >= 1.2.0], [have_libini_config=1], [have_libini_config=])
if test x$have_libini_config = x; then
    AC_MSG_WARN([Could not find LIBINI_CONFIG headers])
else
    INI_CONFIG_CFLAGS="`$PKG_CONFIG --cflags ini_config`"
    INI_CONFIG_LIBS="`$PKG_CONFIG --libs ini_config`"
    AC_CHECK_LIB(ini_config, ini_config_file_open, [],
                 [AC_MSG_WARN([ini_config library must support ini_config_file_open])],
                 [$INI_CONFIG_LIBS])
    AC_CHECK_LIB(ini_config, ini_config_augment, [],
                 [AC_MSG_WARN([ini_config library must support ini_config_augment])],
                 [$INI_CONFIG_LIBS])
fi

if test x$have_libini_config = x1; then
    INI_CFLAGS="$INI_CONFIG_CFLAGS"
    INI_LIBS="$INI_CONFIG_LIBS"
else
    AC_MSG_ERROR([ini_config development packages not available])
fi

AC_SUBST(INI_LIBS)
AC_SUBST(INI_CFLAGS)

AC_CHECK_LIB(ref_array, ref_array_destroy, [],
             [AC_MSG_WARN([ref_array library must support ref_array_destroy])],
             [$INI_CONFIG_LIBS])

AC_RUN_IFELSE([AC_LANG_SOURCE([[
/* See: https://pagure.io/SSSD/ding-libs/pull-request/3172 */
#include <linux/limits.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <ini_configobj.h>
#include <ini_config.h>

static int write_to_file(char *path, char *text)
{
    FILE *f = fopen(path, "w");
    int bytes = 0;
    if (f == NULL)
        return 1;

    bytes = fprintf(f, "%s", text);
    if (bytes != strlen(text))
        return 1;

    return fclose(f);
}

int main(void)
{
    char base_path[PATH_MAX];
    char augment_path[PATH_MAX];

    char config_base[] =
        "[section]\n"
        "key1 = first\n"
        "key2 = exists\n";

    char config_augment[] =
        "[section]\n"
        "key1 = augment\n"
        "key3 = exists\n";

    char *builddir;

    struct ini_cfgobj *in_cfg, *result_cfg;
    struct ini_cfgfile *file_ctx;

    uint32_t merge_flags = INI_MS_DETECT | INI_MS_PRESERVE;

    int ret;

    builddir = getenv("builddir");
    if (builddir == NULL) {
        builddir = strdup(".");
    }

    snprintf(base_path, PATH_MAX, "%s/tmp_augment_base.conf", builddir);
    snprintf(augment_path, PATH_MAX, "%s/tmp_augment_augment.conf", builddir);

    ret = write_to_file(base_path, config_base);
    if (ret != 0) {
        ret = 1;
        goto cleanup;
    }

    ret = write_to_file(augment_path, config_augment);
    if (ret != 0) {
        goto cleanup;
    }

    /* Match only augment.conf */
    const char *m_patterns[] = { "^tmp_augment_augment.conf$", NULL };

     /* Match all sections */
    const char *m_sections[] = { ".*", NULL };

    /* Create config collection */
    ret = ini_config_create(&in_cfg);
    if (ret != EOK)
        goto cleanup;

    /* Open base.conf */
    ret = ini_config_file_open(base_path, 0, &file_ctx);
    if (ret != EOK)
        goto cleanup;

    /* Seed in_cfg with base.conf */
    ret = ini_config_parse(file_ctx, 1, 0, 0, in_cfg);
    if (ret != EOK)
        goto cleanup;

    /* Update base.conf with augment.conf */
    ret = ini_config_augment(in_cfg,
                             builddir,
                             m_patterns,
                             m_sections,
                             NULL,
                             INI_STOP_ON_NONE,
                             0,
                             INI_PARSE_NOSPACE|INI_PARSE_NOTAB,
                             merge_flags,
                             &result_cfg,
                             NULL,
                             NULL);
    /* We always expect EEXIST due to DETECT being set. */
    if (ret != EEXIST)
        goto cleanup;

    ret = 0;

cleanup:
    remove(base_path);
    remove(augment_path);

    /* Per autoconf guidelines */
    if (ret != 0)
        ret = 1;

    return ret;
}
]])]
,, [AC_MSG_ERROR(["ini_config library must support extended INI_MS_DETECT. See: https://pagure.io/SSSD/ding-libs/pull-request/3172"])])

AX_PTHREAD(,[AC_MSG_ERROR([Could not find Pthreads support])])

LIBS="$PTHREAD_LIBS $LIBS"
LIBS="$PTHREAD_CFLAGS $CFLAGS"
CC="$PTHREAD_CC"

AC_CHECK_HEADERS([gssapi/gssapi.h],,[AC_MSG_ERROR([Could not find GSSAPI headers])])
PKG_CHECK_MODULES([KRB5_GSSAPI], [krb5-gssapi >= 1.12.0],
                  [have_krb5_gssapi=1], [have_krb5_gssapi=])
if test x$have_krb5_gssapi = x; then
    AC_MSG_ERROR([Could not find Krb5 / GSSAPI development libraries])
else
    KRB5_CFLAGS="`$PKG_CONFIG --cflags krb5`"
    KRB5_LIBS="`$PKG_CONFIG --libs krb5`"
    GSSAPI_CFLAGS="`$PKG_CONFIG --cflags krb5-gssapi`"
    GSSAPI_LIBS="`$PKG_CONFIG --libs krb5-gssapi`"
fi
AC_CHECK_LIB(gssapi_krb5, gss_import_cred,,
             [AC_MSG_ERROR([GSSAPI library does not support gss_import_cred])],
             [$GSSAPI_LIBS])
AC_CHECK_LIB(gssapi_krb5, gss_export_cred,,
             [AC_MSG_ERROR([GSSAPI library does not support gss_export_cred])],
             [$GSSAPI_LIBS])

AC_CHECK_DECLS([GSS_KRB5_GET_CRED_IMPERSONATOR], [], [],
               [[#include <gssapi/gssapi_krb5.h>]])
AC_CHECK_DECLS([GSS_KRB5_CRED_NO_CI_FLAGS_X], [],
               [AC_MSG_ERROR([krb5 too old; missing GSS_KRB5_CRED_NO_CI_FLAGS_X (v1.14)])],
               [[#include <gssapi/gssapi_krb5.h>]])

AC_SUBST([KRB5_CFLAGS])
AC_SUBST([KRB5_LIBS])
AC_SUBST([GSSAPI_CFLAGS])
AC_SUBST([GSSAPI_LIBS])

AC_CHECK_HEADERS([gssrpc/rpc.h],,[AC_MSG_ERROR([Could not find GSSRPC headers])])
GSSRPC_LIBS="-lgssrpc"
AC_CHECK_LIB(gssrpc, gssrpc_xdrmem_create,,
             [AC_MSG_ERROR([Failed to find GSSRPC symbols])],
             [$GSSAPI_LIBS $GSSRPC_LIBS])
AC_SUBST([GSSRPC_LIBS])

AC_CHECK_FUNCS([__secure_getenv secure_getenv])

WITH_INITSCRIPT
if test x$initscript = xsystemd; then
    WITH_SYSTEMD_UNIT_DIR
fi

if test x$HAVE_MANPAGES != x; then
    CHECK_XML_TOOLS
    CHECK_STYLESHEET([$SGML_CATALOG_FILES],
                     [http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl],
                     [Docbook XSL templates])
    AC_CHECK_PROG([PO4A],[po4a],[po4a],[no])
fi
AM_CONDITIONAL([HAVE_MANPAGES], [test "x$HAVE_MANPAGES" != "x"])
AM_CONDITIONAL([HAVE_PO4A], [test "x$PO4A" != "xno"])

if test x$HAVE_SELINUX != x; then
    AM_CHECK_SELINUX
fi

if test x$HAVE_SYSTEMD_UNIT != x; then
    AM_CHECK_SYSTEMD
fi

AC_PATH_PROG([DOXYGEN], [doxygen], [false])
AM_CONDITIONAL([HAVE_DOXYGEN], [test x$DOXYGEN != xfalse ])

abs_build_dir=`pwd`
AC_DEFINE_UNQUOTED([ABS_BUILD_DIR], ["$abs_build_dir"], [Absolute path to the build directory])
AC_SUBST([abs_builddir], $abs_build_dir)

AC_CONFIG_FILES([Makefile tests/Makefile man/Makefile
                 contrib/gssproxy.spec
		 man/gssproxy-mech.8.xml])
AC_OUTPUT