[thirdparty/binutils-gdb.git] / libctf / configure.ac

dnl                                            -*- Autoconf -*-
dnl Process this file with autoconf to produce a configure script.
dnl
dnl   Copyright (C) 2019-2021 Free Software Foundation, Inc.
dnl
dnl This file 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; see the file COPYING.  If not see
dnl <http://www.gnu.org/licenses/>.
dnl

AC_PREREQ(2.64)
AC_INIT([libctf], 1.2.0)
AC_CONFIG_SRCDIR(ctf-impl.h)
AC_CONFIG_MACRO_DIR(../config)
AC_CONFIG_MACRO_DIR(../bfd)
AC_USE_SYSTEM_EXTENSIONS
AM_INIT_AUTOMAKE

# Checks for programs.
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_RANLIB
AM_PROG_AR
ZW_GNU_GETTEXT_SISTER_DIR

dnl Default to a non shared library.  This may be overridden by the
dnl configure option --enable-shared.
AC_DISABLE_SHARED

LT_INIT
AC_SYS_LARGEFILE

MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])

# Figure out what compiler warnings we can enable.
# See config/warnings.m4 for details.

ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
			  -Wmissing-format-attribute], [warn])
ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
			  -Wold-style-definition], [c_warn])
ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])

# Only enable with --enable-werror-always until existing warnings are
# corrected.
ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])

AM_MAINTAINER_MODE
AM_INSTALL_LIBBFD
ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags])

AC_FUNC_MMAP
# Needed for BFD capability checks.
AC_SEARCH_LIBS(dlopen, dl)
AM_ZLIB

GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing])
if test "${enable_libctf_hash_debugging}" = yes; then
    AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing])
fi
AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes)

# Similar to GDB_AC_CHECK_BFD.
OLD_CFLAGS=$CFLAGS
OLD_LDFLAGS=$LDFLAGS
OLD_LIBS=$LIBS
# Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS
# points somewhere with bfd, with -I/foo/lib and -L/foo/lib.  We
# always want our bfd.
CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS"
ZLIBDIR=`echo $zlibdir | sed 's,\$(top_builddir)/,,g'`
LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS"
intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'`
LIBS="-lbfd -liberty -lz $intl $LIBS"
AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf,
[AC_TRY_LINK([#include <stdlib.h>
	     #include "bfd.h"
	     #include "elf-bfd.h"],
	    [(void) bfd_section_from_elf_index (NULL, 0);
	     return 0;],
	    [ac_cv_libctf_bfd_elf=yes],
	    [ac_cv_libctf_bfd_elf=no])])
CFLAGS=$OLD_CFLAGS
LDFLAGS=$OLD_LDFLAGS
LIBS=$OLD_LIBS

if test $ac_cv_libctf_bfd_elf = yes; then
  AC_DEFINE([HAVE_BFD_ELF], 1,
	    [Whether libbfd was configured for an ELF target.])
fi

AC_C_BIGENDIAN
AC_CHECK_HEADERS(byteswap.h endian.h)
AC_CHECK_FUNCS(pread)

dnl Check for bswap_{16,32,64}
AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]])
AC_CHECK_DECLS([asprintf, vasprintf, stpcpy])

dnl Check for qsort_r.  (Taken from gnulib.)
AC_CHECK_FUNCS_ONCE([qsort_r])
if test $ac_cv_func_qsort_r = yes; then
  AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature],
    [AC_LINK_IFELSE(
       [AC_LANG_PROGRAM([[#undef qsort_r
                          #include <stdlib.h>
                          void qsort_r (void *, size_t, size_t,
                                        int (*) (void const *, void const *,
                                                 void *),
                                        void *);
                          void (*p) (void *, size_t, size_t,
                                     int (*) (void const *, void const *,
                                              void *),
                                     void *) = qsort_r;
                        ]])],
       [ac_cv_libctf_qsort_r_signature=GNU],
       [AC_LINK_IFELSE(
          [AC_LANG_PROGRAM([[#undef qsort_r
	                     #include <stdlib.h>
                             void qsort_r (void *, size_t, size_t, void *,
                                           int (*) (void *,
                                                    void const *,
                                                    void const *));
                             void (*p) (void *, size_t, size_t, void *,
                                        int (*) (void *, void const *,
                                                 void const *)) = qsort_r;
                           ]])],
          [ac_cv_libctf_qsort_r_signature=BSD],
          [ac_cv_libctf_qsort_r_signature=unknown])])])
fi

case x$ac_cv_libctf_qsort_r_signature in
  xGNU)     AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1,
	     [Whether a qsort_r exists with a void *arg as its last arg.]);;
  xBSD)     AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1,
	     [Whether a qsort_r exists with the compar function as its last arg.]);;
  *) ac_cv_libctf_qsort_r_signature=unknown;;
esac

AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown)

AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC],
  [AC_LINK_IFELSE(
    [AC_LANG_PROGRAM([[#include <fcntl.h>
                       #ifndef O_CLOEXEC
                         choke me;
                       #endif
                     ]],
                     [[return O_CLOEXEC;]])],
    [ac_cv_libctf_macro_O_CLOEXEC=yes],
    [ac_cv_libctf_macro_O_CLOEXEC=no])])

if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then
  AC_DEFINE([HAVE_O_CLOEXEC], 1,
	    [Whether the platform has a definition of O_CLOEXEC.])
fi

# Horrible hacks to build DLLs on Windows and a shared library elsewhere.
SHARED_LIBADD=
SHARED_LDFLAGS=
BFD_LIBADD=
BFD_DEPENDENCIES=
if test "$enable_shared" = "yes"; then
# When building a shared libctf, link against the pic version of libiberty
# so that apps that use libctf won't need libiberty just to satisfy any
# libctf references.
# We can't do that if a pic libiberty is unavailable since including non-pic
# code would insert text relocations into libctf.
# Note that linking against libbfd as we do here, which is itself linked
# against libiberty, may not satisfy all the libctf libiberty references
# since libbfd may not pull in the entirety of libiberty.
changequote(,)dnl
  x=`sed -n -e 's/^[ 	]*PICFLAG[ 	]*=[ 	]*//p' < ../libiberty/Makefile | sed -n '$p'`
changequote([,])dnl
  if test -n "$x"; then
    SHARED_LIBADD="-L`pwd`/../libiberty/pic -liberty"
  fi

  case "${host}" in
  # More hacks to build DLLs on Windows.
    *-*-cygwin*)
      SHARED_LDFLAGS="-no-undefined"
      SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin"
      BFD_LIBADD="-L`pwd`/../bfd -lbfd"
      ;;

    *-*-darwin*)
      BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.dylib"
      BFD_DEPENDENCIES="../bfd/libbfd.la"
      ;;
    *)
      case "$host_vendor" in
	hp)
	  BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.sl"
	  ;;
	*)
	  BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.so"
	  ;;
      esac
      BFD_DEPENDENCIES="../bfd/libbfd.la"
      ;;
  esac
fi
AC_SUBST(SHARED_LDFLAGS)
AC_SUBST(SHARED_LIBADD)
AC_SUBST(BFD_LIBADD)
AC_SUBST(BFD_DEPENDENCIES)

# Use a version script, if possible, or an -export-symbols-regex otherwise.
VERSION_FLAGS='-export-symbols-regex ctf_.*'
if $LD --help 2>&1 | grep -- --version-script >/dev/null; then
    VERSION_FLAGS="-Wl,--version-script='$srcdir/libctf.ver'"
fi
AC_SUBST(VERSION_FLAGS)

AC_CONFIG_FILES(Makefile)
AC_CONFIG_HEADERS(config.h)
AC_OUTPUT
Commit	Line	Data
0e65dfba NA	1	dnl -- Autoconf --
	2	dnl Process this file with autoconf to produce a configure script.
	3	dnl
250d07de	4	dnl Copyright (C) 2019-2021 Free Software Foundation, Inc.
0e65dfba NA	5	dnl
	6	dnl This file is free software; you can redistribute it and/or modify
	7	dnl it under the terms of the GNU General Public License as published by
	8	dnl the Free Software Foundation; either version 2 of the License, or
	9	dnl (at your option) any later version.
	10	dnl
	11	dnl This program is distributed in the hope that it will be useful,
	12	dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	dnl GNU General Public License for more details.
	15	dnl
	16	dnl You should have received a copy of the GNU General Public License
	17	dnl along with this program; see the file COPYING. If not see
	18	dnl <http://www.gnu.org/licenses/>.
	19	dnl
	20
	21	AC_PREREQ(2.64)
987cf30a	22	AC_INIT([libctf], 1.2.0)
0e65dfba NA	23	AC_CONFIG_SRCDIR(ctf-impl.h)
0e65dfba NA	24	AC_CONFIG_MACRO_DIR(../config)
87279e3c	25	AC_CONFIG_MACRO_DIR(../bfd)
0e65dfba NA	26	AC_USE_SYSTEM_EXTENSIONS
	27	AM_INIT_AUTOMAKE
	28
	29	# Checks for programs.
	30	AC_PROG_MAKE_SET
	31	AC_PROG_CC
	32	AC_PROG_RANLIB
	33	AM_PROG_AR
8e6635bd	34	ZW_GNU_GETTEXT_SISTER_DIR
0e65dfba	35
87279e3c NA	36	dnl Default to a non shared library. This may be overridden by the
	37	dnl configure option --enable-shared.
	38	AC_DISABLE_SHARED
	39
	40	LT_INIT
0e65dfba NA	41	AC_SYS_LARGEFILE
	42
	43	MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
	44	AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
	45	AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
	46	AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
	47
	48	# Figure out what compiler warnings we can enable.
	49	# See config/warnings.m4 for details.
	50
	51	ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
	52	-Wmissing-format-attribute], [warn])
	53	ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
	54	-Wold-style-definition], [c_warn])
	55	ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
	56
	57	# Only enable with --enable-werror-always until existing warnings are
	58	# corrected.
	59	ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
	60
	61	AM_MAINTAINER_MODE
87279e3c	62	AM_INSTALL_LIBBFD
0e65dfba NA	63	ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags])
	64
	65	AC_FUNC_MMAP
87279e3c	66	# Needed for BFD capability checks.
9698cf9b	67	AC_SEARCH_LIBS(dlopen, dl)
a0486bac	68	AM_ZLIB
9698cf9b	69
a9b98702 NA	70	GCC_ENABLE([libctf-hash-debugging], [no], [], [Enable expensive debugging of CTF deduplication type hashing])
	71	if test "${enable_libctf_hash_debugging}" = yes; then
	72	AC_DEFINE(ENABLE_LIBCTF_HASH_DEBUGGING, 1, [Enable expensive debugging of CTF deduplication type hashing])
	73	fi
	74	AM_CONDITIONAL(ENABLE_LIBCTF_HASH_DEBUGGING, test "${enable_libctf_hash_debugging}" = yes)
	75
9698cf9b NA	76	# Similar to GDB_AC_CHECK_BFD.
	77	OLD_CFLAGS=$CFLAGS
	78	OLD_LDFLAGS=$LDFLAGS
	79	OLD_LIBS=$LIBS
	80	# Put the old CFLAGS/LDFLAGS last, in case the user's (C\|LD)FLAGS
	81	# points somewhere with bfd, with -I/foo/lib and -L/foo/lib. We
	82	# always want our bfd.
	83	CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS"
	84	ZLIBDIR=`echo $zlibdir \| sed 's,\$(top_builddir)/,,g'`
	85	LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS"
	86	intl=`echo $LIBINTL \| sed 's,${top_builddir}/,,g'`
	87	LIBS="-lbfd -liberty -lz $intl $LIBS"
	88	AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf,
	89	[AC_TRY_LINK([#include <stdlib.h>
	90	#include "bfd.h"
	91	#include "elf-bfd.h"],
	92	[(void) bfd_section_from_elf_index (NULL, 0);
	93	return 0;],
	94	[ac_cv_libctf_bfd_elf=yes],
	95	[ac_cv_libctf_bfd_elf=no])])
	96	CFLAGS=$OLD_CFLAGS
	97	LDFLAGS=$OLD_LDFLAGS
	98	LIBS=$OLD_LIBS
	99
	100	if test $ac_cv_libctf_bfd_elf = yes; then
	101	AC_DEFINE([HAVE_BFD_ELF], 1,
	102	[Whether libbfd was configured for an ELF target.])
	103	fi
	104
a0486bac JM	105	AC_C_BIGENDIAN
a0486bac JM	106	AC_CHECK_HEADERS(byteswap.h endian.h)
0e65dfba	107	AC_CHECK_FUNCS(pread)
6b22174f	108
e755667f NA	109	dnl Check for bswap_{16,32,64}
e755667f NA	110	AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64], [], [], [[#include <byteswap.h>]])
0f0c11f7	111	AC_CHECK_DECLS([asprintf, vasprintf, stpcpy])
3a657c60	112
6b22174f NA	113	dnl Check for qsort_r. (Taken from gnulib.)
	114	AC_CHECK_FUNCS_ONCE([qsort_r])
	115	if test $ac_cv_func_qsort_r = yes; then
	116	AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature],
	117	[AC_LINK_IFELSE(
	118	[AC_LANG_PROGRAM([[#undef qsort_r
	119	#include <stdlib.h>
	120	void qsort_r (void *, size_t, size_t,
	121	int () (void const , void const *,
	122	void *),
	123	void *);
	124	void (p) (void , size_t, size_t,
	125	int () (void const , void const *,
	126	void *),
	127	void *) = qsort_r;
	128	]])],
	129	[ac_cv_libctf_qsort_r_signature=GNU],
	130	[AC_LINK_IFELSE(
	131	[AC_LANG_PROGRAM([[#undef qsort_r
	132	#include <stdlib.h>
	133	void qsort_r (void , size_t, size_t, void ,
	134	int () (void ,
	135	void const *,
	136	void const *));
	137	void (p) (void , size_t, size_t, void *,
	138	int () (void , void const *,
	139	void const *)) = qsort_r;
	140	]])],
	141	[ac_cv_libctf_qsort_r_signature=BSD],
	142	[ac_cv_libctf_qsort_r_signature=unknown])])])
	143	fi
	144
	145	case x$ac_cv_libctf_qsort_r_signature in
	146	xGNU) AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1,
	147	[Whether a qsort_r exists with a void *arg as its last arg.]);;
	148	xBSD) AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1,
	149	[Whether a qsort_r exists with the compar function as its last arg.]);;
	150	*) ac_cv_libctf_qsort_r_signature=unknown;;
	151	esac
	152
	153	AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown)
0e65dfba	154
ad118caa NA	155	AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC],
	156	[AC_LINK_IFELSE(
	157	[AC_LANG_PROGRAM([[#include <fcntl.h>
	158	#ifndef O_CLOEXEC
	159	choke me;
	160	#endif
	161	]],
	162	[[return O_CLOEXEC;]])],
	163	[ac_cv_libctf_macro_O_CLOEXEC=yes],
	164	[ac_cv_libctf_macro_O_CLOEXEC=no])])
	165
	166	if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then
	167	AC_DEFINE([HAVE_O_CLOEXEC], 1,
	168	[Whether the platform has a definition of O_CLOEXEC.])
	169	fi
	170
87279e3c NA	171	# Horrible hacks to build DLLs on Windows and a shared library elsewhere.
	172	SHARED_LIBADD=
	173	SHARED_LDFLAGS=
	174	BFD_LIBADD=
	175	BFD_DEPENDENCIES=
	176	if test "$enable_shared" = "yes"; then
	177	# When building a shared libctf, link against the pic version of libiberty
	178	# so that apps that use libctf won't need libiberty just to satisfy any
	179	# libctf references.
	180	# We can't do that if a pic libiberty is unavailable since including non-pic
	181	# code would insert text relocations into libctf.
	182	# Note that linking against libbfd as we do here, which is itself linked
	183	# against libiberty, may not satisfy all the libctf libiberty references
	184	# since libbfd may not pull in the entirety of libiberty.
	185	changequote(,)dnl
	186	x=`sed -n -e 's/^[ ]PICFLAG[ ]=[ ]*//p' < ../libiberty/Makefile \| sed -n '$p'`
	187	changequote([,])dnl
	188	if test -n "$x"; then
	189	SHARED_LIBADD="-L`pwd`/../libiberty/pic -liberty"
	190	fi
	191
	192	case "${host}" in
	193	# More hacks to build DLLs on Windows.
	194	--cygwin*)
	195	SHARED_LDFLAGS="-no-undefined"
	196	SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin"
	197	BFD_LIBADD="-L`pwd`/../bfd -lbfd"
	198	;;
	199
	200	--darwin*)
	201	BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.dylib"
	202	BFD_DEPENDENCIES="../bfd/libbfd.la"
	203	;;
	204	*)
	205	case "$host_vendor" in
	206	hp)
	207	BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.sl"
	208	;;
	209	*)
	210	BFD_LIBADD="-Wl,`pwd`/../bfd/.libs/libbfd.so"
	211	;;
	212	esac
	213	BFD_DEPENDENCIES="../bfd/libbfd.la"
	214	;;
	215	esac
	216	fi
	217	AC_SUBST(SHARED_LDFLAGS)
	218	AC_SUBST(SHARED_LIBADD)
	219	AC_SUBST(BFD_LIBADD)
	220	AC_SUBST(BFD_DEPENDENCIES)
	221
	222	# Use a version script, if possible, or an -export-symbols-regex otherwise.
	223	VERSION_FLAGS='-export-symbols-regex ctf_.*'
	224	if $LD --help 2>&1 \| grep -- --version-script >/dev/null; then
	225	VERSION_FLAGS="-Wl,--version-script='$srcdir/libctf.ver'"
	226	fi
	227	AC_SUBST(VERSION_FLAGS)
	228
0e65dfba NA	229	AC_CONFIG_FILES(Makefile)
	230	AC_CONFIG_HEADERS(config.h)
	231	AC_OUTPUT