configure.ac

dnl supermin configure.ac
dnl (C) Copyright 2009-2024 Red Hat Inc.
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
dnl
dnl Written by Richard W.M. Jones <rjones@redhat.com>

dnl MAJOR = 5 (unless we break the command line again)
dnl MINOR = even for stable branch, odd for development branch
dnl RELEASE = increments for each release
AC_INIT([supermin],[5.3.5])

AM_INIT_AUTOMAKE(foreign)
AC_REQUIRE_AUX_FILE([supermin-test-driver])

dnl Check for basic C environment.
AC_PROG_CC

AC_PROG_INSTALL
AC_PROG_CPP

AC_C_PROTOTYPES
test "x$U" != "x" && AC_MSG_ERROR([Compiler not ANSI compliant])

AM_PROG_CC_C_O

dnl Enable GNU stuff.
AC_USE_SYSTEM_EXTENSIONS

dnl Check support for 64 bit file offsets.
AC_SYS_LARGEFILE

dnl Which header file defines major, minor, makedev.
AC_HEADER_MAJOR

dnl Define the host CPU architecture (defines host_cpu).
AC_CANONICAL_HOST

# Define $(SED).
m4_ifdef([AC_PROG_SED],[
    AC_PROG_SED
],[
    dnl ... else hope for the best
    AC_SUBST([SED], "sed")
])

AC_ARG_ENABLE([werror],
    [AS_HELP_STRING([--enable-werror],
                    [turn GCC warnings into errors (for developers)])],
    [case $enableval in
     yes|no) ;;
     *)      AC_MSG_ERROR([bad value $enableval for werror option]) ;;
     esac
     gcc_werror=$enableval],
    [gcc_werror=no]
)
if test "$gcc_werror" = "yes"; then
    WERROR_CFLAGS="-Werror"
    AC_SUBST([WERROR_CFLAGS])
fi

# OCaml and ocamlfind are required to compile.
AC_PROG_OCAML
if test "$OCAMLC" = "no"; then
    AC_MSG_ERROR([You must install the OCaml compiler])
fi
AM_CONDITIONAL([HAVE_OCAMLOPT],[test "$OCAMLBEST" = "opt"])
AC_PROG_FINDLIB
if test "$OCAMLFIND" = "no"; then
    AC_MSG_ERROR([You must install OCaml findlib (the ocamlfind command)])
fi

dnl Check if OCaml has caml_alloc_initialized_string (added 2017).
AS_IF([test "x$OCAMLC" != "xno" && test "x$OCAMLFIND" != "xno"],[
    AC_MSG_CHECKING([for caml_alloc_initialized_string])
    cat >conftest.c <<'EOF'
#include <caml/alloc.h>
int main () { char *p = (void *) caml_alloc_initialized_string; return 0; }
EOF
    AS_IF([$OCAMLC conftest.c >&AS_MESSAGE_LOG_FD 2>&1],[
        AC_MSG_RESULT([yes])
        AC_DEFINE([HAVE_CAML_ALLOC_INITIALIZED_STRING],[1],
                  [caml_alloc_initialized_string found at compile time.])
    ],[
        AC_MSG_RESULT([no])
    ])
    rm -f conftest.c conftest.o
])

# NB: AC_CHECK_PROG(S) or AC_PATH_PROG(S)?
# Use AC_CHECK_PROG(S) for programs which are only used during build.
# Use AC_PATH_PROG(S) for program names which are compiled into the
# binary and used at run time.  The reason is so that we know which
# programs the binary actually uses.

dnl Optional programs.
AC_CHECK_PROG(PERLDOC,[perldoc],[perldoc],[no])
if test "x$PERLDOC" = "xno" ; then
  AC_MSG_WARN([perldoc not found - install perl to make man pages])
fi
AM_CONDITIONAL(HAVE_PERLDOC,[test "x$PERLDOC" != "xno"])

dnl For yum-rpm handler.
AC_PATH_PROG(RPM,[rpm],[no])
AC_PATH_PROG(RPM2CPIO,[rpm2cpio],[no])
AC_PATH_PROG(YUMDOWNLOADER,[yumdownloader],[no])
AC_PATH_PROG(DNF,[dnf],[no])
PKG_CHECK_MODULES([LIBRPM], [rpm], [librpm=yes], [:])
if test "x$librpm" = "xyes"; then
  AC_DEFINE([HAVE_LIBRPM], [1], [Define if you have librpm])
fi

dnl For Zypper handler.
AC_PATH_PROG(ZYPPER,[zypper],[no])

dnl For URPMI handler.
AC_PATH_PROG(URPMI,[urpmi],[no], [$PATH$PATH_SEPARATOR/usr/sbin])

dnl For Debian handler.
AC_PATH_PROG(APT_GET,[apt-get],[no])
AC_PATH_PROG(DPKG,[dpkg],[no],[/usr/bin:/bin])
AC_PATH_PROG(DPKG_DEB,[dpkg-deb],[no],[/usr/bin:/bin])
AC_PATH_PROG(DPKG_QUERY,[dpkg-query],[no],[/usr/bin:/bin])
AC_PATH_PROG(DPKG_DIVERT,[[dpkg-divert]],[no],[/usr/bin:/bin])

dnl For FrugalWare handler (currently disabled).
AC_PATH_PROG(PACMAN_G2,[pacman-g2],[no])

dnl For ArchLinux handler.
AC_PATH_PROG(PACMAN,[pacman],[no])
AC_PATH_PROG(PACTREE,[pactree],[no])
AC_PATH_PROG(MAKEPKG,[makepkg],[no])

dnl Check for fakeroot, only used a few drivers where the host package
dnl manager contains broken/unnecessary tests for root privs.
AC_PATH_PROG(FAKEROOT,[fakeroot],[no])

dnl Check for zcat, only needed if you have gzip-compressed kernel modules.
AC_PATH_PROG(ZCAT,[zcat],[no])

dnl Check for xzcat, only needed if you have xz-compressed kernel modules.
AC_PATH_PROG(XZCAT,[xzcat],[no])

dnl Check for zstdcat, only needed if you have zstd-compressed kernel modules.
AC_PATH_PROG(ZSTDCAT,[zstdcat],[no])

dnl mke2fs.
AC_PATH_PROG([MKE2FS],[mke2fs],[no],
             [$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR])
if test "x$MKE2FS" = "xno" ; then
  AC_MSG_FAILURE([mke2fs program not found])
fi
AC_SUBST([MKE2FS])

dnl RHEL 5 mke2fs needed -T <fs> instead of -t <fs>.  Unhelpfully
dnl the --help output doesn't mention this, so we have to test it.
AC_MSG_CHECKING([$MKE2FS -t or -T])
rm -f conftest.img
dd if=/dev/zero of=conftest.img bs=1024 count=1024 >&AS_MESSAGE_LOG_FD 2>&1
if $MKE2FS -t ext2 -F -q conftest.img >&AS_MESSAGE_LOG_FD 2>&1 ; then
  MKE2FS_T_OPTION=-t
elif $MKE2FS -T ext2 -F -q conftest.img >&AS_MESSAGE_LOG_FD 2>&1 ; then
  MKE2FS_T_OPTION=-T
else
  AC_MSG_ERROR([$MKE2FS cannot create filesystems])
fi
rm conftest.img
AC_MSG_RESULT([$MKE2FS_T_OPTION])
AC_SUBST([MKE2FS_T_OPTION])

dnl ext2fs, com_err.
PKG_CHECK_MODULES([EXT2FS], [ext2fs])
PKG_CHECK_MODULES([COM_ERR], [com_err])

dnl Requires ext2fs_close2 function, added in 2011.
old_LIBS="$LIBS"
LIBS="$EXT2FS_LIBS $COM_ERR_LIBS"
AC_CHECK_FUNCS([ext2fs_close2])
LIBS="$old_LIBS"

dnl GNU awk.
AC_CHECK_PROG(GAWK,[gawk],[gawk],[no])
if test "x$GAWK" = "xno" ; then
  AC_MSG_FAILURE([gawk (GNU awk) not found])
fi

dnl cpio
AC_PATH_PROG([CPIO],[cpio],[no])
test "x$CPIO" = "xno" &&
    AC_MSG_ERROR([cpio must be installed])

dnl Disable network tests.
AC_ARG_ENABLE([network-tests],
    [AS_HELP_STRING([--disable-network-tests],
                    [Disable tests that need a network connection.])],
    [],
    [enable_network_tests=yes])
AM_CONDITIONAL([NETWORK_TESTS],
               [test "x$enable_network_tests" = "xyes"])

AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([src/supermin-link.sh],
		[chmod +x,-w src/supermin-link.sh])
AC_CONFIG_FILES([Makefile
        examples/Makefile
        init/Makefile
        src/config.ml
        src/Makefile
        tests/Makefile])
AC_OUTPUT