gdb: add target_ops::supports_displaced_step

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

diff --git a/libctf/configure.ac b/libctf/configure.ac
index beb90ba75cc4cf58329da2f5551d81201affe2db..7f2a713b93d17c0192056ec84175df6feda4ae71 100644 (file)
--- a/libctf/configure.ac
+++ b/libctf/configure.ac
@@ -1,7 +1,7 @@
 dnl                                            -*- Autoconf -*-
 dnl Process this file with autoconf to produce a configure script.
 dnl
-dnl   Copyright (C) 2019 Free Software Foundation, Inc.
+dnl   Copyright (C) 2019-2020 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
@@ -22,6 +22,7 @@ AC_PREREQ(2.64)
 AC_INIT([libctf library], 1.2.0-pre)
 AC_CONFIG_SRCDIR(ctf-impl.h)
 AC_CONFIG_MACRO_DIR(../config)
+AC_CONFIG_MACRO_DIR(../bfd)
 AC_USE_SYSTEM_EXTENSIONS
 AM_INIT_AUTOMAKE
 
@@ -31,6 +32,11 @@ AC_PROG_CC
 AC_PROG_RANLIB
 AM_PROG_AR
 
+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
@@ -52,9 +58,11 @@ ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
 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
 
@@ -91,6 +99,8 @@ AC_C_BIGENDIAN
 AC_CHECK_HEADERS(byteswap.h endian.h)
 AC_CHECK_FUNCS(pread)
 
+AC_CHECK_DECLS([asprintf])
+
 dnl Check for qsort_r.  (Taken from gnulib.)
 AC_CHECK_FUNCS_ONCE([qsort_r])
 if test $ac_cv_func_qsort_r = yes; then
@@ -133,6 +143,80 @@ 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