libctf: installable libctf as a shared library

This lets other programs read and write CTF-format data.

Two versioned shared libraries are created: libctf.so and
libctf-nobfd.so.  They contain identical content except that
libctf-nobfd.so contains no references to libbfd and does not implement
ctf_open, ctf_fdopen, ctf_bfdopen or ctf_bfdopen_ctfsect, so it can be
used by programs that cannot use BFD, like readelf.

The soname major version is presently .0 until the linker API
stabilizes, when it will flip to .1 and hopefully never change again.

New in v3.
v4: libtoolize and turn into a pair of shared libraries.  Drop
    --enable-install-ctf: now controlled by --enable-shared and
    --enable-install-libbfd, like everything else.
v5: Add ../bfd to ACLOCAL_AMFLAGS and AC_CONFIG_MACRO_DIR.  Fix tabdamage.

	* Makefile.def (host_modules): libctf is no longer no_install.
	* Makefile.in: Regenerated.
libctf/
	* configure.ac (AC_DISABLE_SHARED): New, like opcodes/.
	(LT_INIT): Likewise.
	(AM_INSTALL_LIBBFD): Likewise.
	(dlopen): Note why this is necessary in a comment.
	(SHARED_LIBADD): Initialize for possibly-PIC libiberty: derived from
	opcodes/.
	(SHARED_LDFLAGS): Likewise.
	(BFD_LIBADD): Likewise, for libbfd.
	(BFD_DEPENDENCIES): Likewise.
	(VERSION_FLAGS): Initialize, using a version script if ld supports
	one, or libtool -export-symbols-regex otherwise.
	(AC_CONFIG_MACRO_DIR): Add ../BFD.
	* Makefile.am (ACLOCAL_AMFLAGS): Likewise.
	(INCDIR): New.
	(AM_CPPFLAGS): Use $(srcdir), not $(top_srcdir).
	(noinst_LIBRARIES): Replace with...
	[INSTALL_LIBBFD] (lib_LTLIBRARIES): This, or...
	[!INSTALL_LIBBFD] (noinst_LTLIBRARIES): ... this, mentioning new
	libctf-nobfd.la as well.
	[INSTALL_LIBCTF] (include_HEADERS): Add the CTF headers.
	[!INSTALL_LIBCTF] (include_HEADERS): New, empty.
	(libctf_a_SOURCES): Rename to...
	(libctf_nobfd_la_SOURCES): ... this, all of libctf other than
	ctf-open-bfd.c.
	(libctf_la_SOURCES): Now derived from libctf_nobfd_la_SOURCES,
	with ctf-open-bfd.c added.
	(libctf_nobfd_la_LIBADD): New, using @SHARED_LIBADD@.
	(libctf_la_LIBADD): New, using @BFD_LIBADD@ as well.
	(libctf_la_DEPENDENCIES): New, using @BFD_DEPENDENCIES@.
	* Makefile.am [INSTALL_LIBCTF]: Use it.
	* aclocal.m4: Add ../bfd/acinclude.m4, ../config/acx.m4, and the
	libtool macros.
	* libctf.ver: New, everything is version LIBCTF_1.0 currently (even
	the unstable components).
	* Makefile.in: Regenerated.
	* config.h.in: Likewise.
	* configure: Likewise.
binutils/
	* Makefile.am (LIBCTF): Mention the .la file.
	(LIBCTF_NOBFD): New.
	(readelf_DEPENDENCIES): Use it.
	(readelf_LDADD): Likewise.
	* Makefile.in: Regenerated.
ld/
	* configure.ac (TESTCTFLIB): Set to the .so or .a, like TESTBFDLIB.
	* Makefile.am (TESTCTFLIB): Use it.
	(LIBCTF): Use the .la file.
	(check-DEJAGNU): Use it.
	* Makefile.in: Regenerated.
	* configure: Likewise.
include/
	* ctf-api.h: Note the instability of the ctf_link interfaces.

5 files changed, 26 insertions, 8 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index dd0ba41..144320c 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,12 @@
+2019-09-23  Nick Alcock  <nick.alcock@oracle.com>
+
+	* configure.ac (TESTCTFLIB): Set to the .so or .a, like TESTBFDLIB.
+	* Makefile.am (TESTCTFLIB): Use it.
+	(LIBCTF): Use the .la file.
+	(check-DEJAGNU): Use it.
+	* Makefile.in: Regenerated.
+	* configure: Likewise.
+
 2019-09-30  Nick Alcock  <nick.alcock@oracle.com>
 
 	* ldlang.h: (struct lang_input_statement_struct): Add the_ctf.
diff --git a/ld/Makefile.am b/ld/Makefile.am
index 00a2dc9..2790838 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -157,7 +157,7 @@ AM_CPPFLAGS = -I. -I$(srcdir) -I../bfd -I$(BFDDIR) -I$(INCDIR) @zlibinc@ \
 
 BFDLIB = ../bfd/libbfd.la
 LIBIBERTY = ../libiberty/libiberty.a
-LIBCTF = ../libctf/libctf.a
+LIBCTF = ../libctf/libctf.la
 
 # These all start with e so 'make clean' can find them.
 ALL_EMULATION_SOURCES = \
@@ -972,8 +972,9 @@ ld_new_LDADD = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) $(BFDLIB) $(LIBCTF) $(LI
 # Dependency tracking for the generated emulation files.
 EXTRA_ld_new_SOURCES += $(ALL_EMULATION_SOURCES) $(ALL_64_EMULATION_SOURCES)
 
-# This is the real libbfd.a created by libtool.
+# This is the real libbfd.a and libctf.a created by libtool.
 TESTBFDLIB = @TESTBFDLIB@
+TESTCTFLIB = @TESTCTFLIB@
 
 check-DEJAGNU: site.exp
 	srcroot=`cd $(srcdir) && pwd`; export srcroot; \
@@ -986,7 +987,7 @@ check-DEJAGNU: site.exp
 		CC="$(CC_FOR_TARGET)" CFLAGS="$(CFLAGS_FOR_TARGET)" \
 		CXX="$(CXX_FOR_TARGET)" CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
 		CC_FOR_HOST="$(CC)" CFLAGS_FOR_HOST="$(CFLAGS)" \
-		OFILES="$(OFILES)" BFDLIB="$(TESTBFDLIB)" CTFLIB="$(LIBCTF) $(ZLIB)" \
+		OFILES="$(OFILES)" BFDLIB="$(TESTBFDLIB)" CTFLIB="$(TESTCTFLIB) $(ZLIB)" \
 		LIBIBERTY="$(LIBIBERTY) $(LIBINTL)" LIBS="$(LIBS)" \
 		DO_COMPARE="`echo '$(do_compare)' | sed -e 's,\\$$,,g'`" \
 		$(RUNTESTFLAGS); \
diff --git a/ld/Makefile.in b/ld/Makefile.in
index 8b4753b..395bef1 100644
--- a/ld/Makefile.in
+++ b/ld/Makefile.in
@@ -460,8 +460,9 @@ STRIP = @STRIP@
 TARGET_SYSTEM_ROOT = @TARGET_SYSTEM_ROOT@
 TARGET_SYSTEM_ROOT_DEFINE = @TARGET_SYSTEM_ROOT_DEFINE@
 
-# This is the real libbfd.a created by libtool.
+# This is the real libbfd.a and libctf.a created by libtool.
 TESTBFDLIB = @TESTBFDLIB@
+TESTCTFLIB = @TESTCTFLIB@
 USE_NLS = @USE_NLS@
 VERSION = @VERSION@
 WARN_CFLAGS = @WARN_CFLAGS@
@@ -646,7 +647,7 @@ AM_CPPFLAGS = -I. -I$(srcdir) -I../bfd -I$(BFDDIR) -I$(INCDIR) @zlibinc@ \
 
 BFDLIB = ../bfd/libbfd.la
 LIBIBERTY = ../libiberty/libiberty.a
-LIBCTF = ../libctf/libctf.a
+LIBCTF = ../libctf/libctf.la
 
 # These all start with e so 'make clean' can find them.
 ALL_EMULATION_SOURCES = \
@@ -2574,7 +2575,7 @@ check-DEJAGNU: site.exp
 		CC="$(CC_FOR_TARGET)" CFLAGS="$(CFLAGS_FOR_TARGET)" \
 		CXX="$(CXX_FOR_TARGET)" CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
 		CC_FOR_HOST="$(CC)" CFLAGS_FOR_HOST="$(CFLAGS)" \
-		OFILES="$(OFILES)" BFDLIB="$(TESTBFDLIB)" CTFLIB="$(LIBCTF) $(ZLIB)" \
+		OFILES="$(OFILES)" BFDLIB="$(TESTBFDLIB)" CTFLIB="$(TESTCTFLIB) $(ZLIB)" \
 		LIBIBERTY="$(LIBIBERTY) $(LIBINTL)" LIBS="$(LIBS)" \
 		DO_COMPARE="`echo '$(do_compare)' | sed -e 's,\\$$,,g'`" \
 		$(RUNTESTFLAGS); \
diff --git a/ld/configure b/ld/configure
index 9ae333f..2e5e10d 100755
--- a/ld/configure
+++ b/ld/configure
@@ -634,6 +634,7 @@ ac_subst_vars='am__EXEEXT_FALSE
 am__EXEEXT_TRUE
 LTLIBOBJS
 LIBOBJS
+TESTCTFLIB
 TESTBFDLIB
 EMULATION_LIBPATH
 LIB_PATH
@@ -12031,7 +12032,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12034 "configure"
+#line 12035 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12137,7 +12138,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12140 "configure"
+#line 12141 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -17667,11 +17668,14 @@ EMULATION_LIBPATH=$all_libpath
 
 if test x${enable_static} = xno; then
   TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
+  TESTCTFLIB="-Wl,--rpath,../libctf/.libs ../libctf/.libs/libctf.so"
 else
   TESTBFDLIB="../bfd/.libs/libbfd.a"
+  TESTCTFLIB="../libctf/.libs/libctf.a"
 fi
 
 
+
 target_vendor=${target_vendor=$host_vendor}
 case "$target_vendor" in
   hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
diff --git a/ld/configure.ac b/ld/configure.ac
index 200d9d4..bdc1677 100644
--- a/ld/configure.ac
+++ b/ld/configure.ac
@@ -491,10 +491,13 @@ AC_SUBST(EMULATION_LIBPATH)
 
 if test x${enable_static} = xno; then
   TESTBFDLIB="-Wl,--rpath,../bfd/.libs ../bfd/.libs/libbfd.so"
+  TESTCTFLIB="-Wl,--rpath,../libctf/.libs ../libctf/.libs/libctf.so"
 else
   TESTBFDLIB="../bfd/.libs/libbfd.a"
+  TESTCTFLIB="../libctf/.libs/libctf.a"
 fi
 AC_SUBST(TESTBFDLIB)
+AC_SUBST(TESTCTFLIB)
 
 target_vendor=${target_vendor=$host_vendor}
 case "$target_vendor" in