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# ldd.m4 serial 1
dnl Copyright (C) 2006, 2009-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Sets LDDPROG to a command and LDDPOSTPROC to a filter command, such that
# $LDDPROG program $LDDPOSTPROC
# outputs a whitespace-separated list of the dynamically linked dependencies
# of the program, as library names (no full pathnames), or nothing if the
# program is statically linked or if the service is not supported on the given
# system.
dnl From Bruno Haible.
AC_DEFUN([gl_LDD],
[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AC_PROG_CC])
dnl Default values.
LDDPROG=':'
LDDPOSTPROC=
dnl First try objdump, since it works when cross-compiling.
AC_CHECK_TOOL([OBJDUMP], [objdump], [false])
changequote(,)dnl
if test "$OBJDUMP" != "false"; then
LDDPROG="$OBJDUMP -p"
dnl The output of "LC_ALL=C objdump -p program" of a program or library
dnl looks like this:
dnl
dnl libnet.so: file format elf32-i386
dnl
dnl Program Header:
dnl LOAD off 0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**12
dnl filesz 0x0001391d memsz 0x0001391d flags r-x
dnl LOAD off 0x00013920 vaddr 0x00014920 paddr 0x00014920 align 2**12
dnl filesz 0x00001874 memsz 0x0001b020 flags rw-
dnl DYNAMIC off 0x00015104 vaddr 0x00016104 paddr 0x00016104 align 2**2
dnl filesz 0x00000090 memsz 0x00000090 flags rw-
dnl
dnl Dynamic Section:
dnl NEEDED libroot.so
dnl SONAME libnet.so
dnl SYMBOLIC 0x0
dnl INIT 0x2aec
dnl FINI 0x12a2c
dnl HASH 0x94
dnl STRTAB 0x1684
dnl SYMTAB 0x774
dnl STRSZ 0xbd5
dnl SYMENT 0x10
dnl PLTGOT 0x15f20
dnl PLTRELSZ 0x320
dnl PLTREL 0x11
dnl JMPREL 0x27cc
dnl REL 0x225c
dnl RELSZ 0x570
dnl RELENT 0x8
LDDPOSTPROC="2>/dev/null | sed -n -e 's,^ NEEDED *\\([^ ].*\\)\$,\\1,p'"
else
if test "$cross_compiling" = no; then
dnl Not cross-compiling. Try system dependent vendor tools.
case "$host_os" in
aix*)
LDDPROG="dump -H"
dnl The output of "LC_ALL=C dump -H program" looks like this:
dnl
dnl program:
dnl
dnl ***Loader Section***
dnl Loader Header Information
dnl VERSION# #SYMtableENT #RELOCent LENidSTR
dnl 0x00000001 0x00000005 0x0000000d 0x0000001e
dnl
dnl #IMPfilID OFFidSTR LENstrTBL OFFstrTBL
dnl 0x00000002 0x00000134 0x0000000d 0x00000152
dnl
dnl
dnl ***Import File Strings***
dnl INDEX PATH BASE MEMBER
dnl 0 /usr/lib:/lib
dnl 1 libc.a shr.o
dnl
LDDPOSTPROC="2>/dev/null | sed -e '/^[^0-9]/d' -e '/^0x/d' | sed -n -e 's,^[0-9]* *\\([^ ]*\\).*\$,\\1,p' | sed -e 's,^.*/,,'"
;;
darwin*)
LDDPROG="otool -L"
dnl The output of "otool -L program" looks like this:
dnl program:
dnl /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 71.1.4)
LDDPOSTPROC="2>/dev/null | sed -n -e 's,^ \\([^ ]*\\).*\$,\\1,p' | sed -e 's,^.*/,,'"
;;
hpux*)
LDDPROG="chatr"
dnl The output of "LC_ALL=C chatr program" looks like this:
dnl program:
dnl shared executable
dnl shared library dynamic path search:
dnl SHLIB_PATH disabled second
dnl embedded path disabled first Not Defined
dnl shared library list:
dnl dynamic /usr/lib/libc.2
dnl shared library binding:
dnl deferred
dnl global hash table disabled
dnl plabel caching disabled
dnl global hash array size:1103
dnl global hash array nbuckets:3
dnl shared vtable support disabled
dnl static branch prediction disabled
dnl executable from stack: D (default)
dnl kernel assisted branch prediction enabled
dnl lazy swap allocation disabled
dnl text segment locking disabled
dnl data segment locking disabled
dnl third quadrant private data space disabled
dnl fourth quadrant private data space disabled
dnl third quadrant global data space disabled
dnl data page size: D (default)
dnl instruction page size: D (default)
dnl nulptr references disabled
dnl shared library private mapping disabled
dnl shared library text merging disabled
dnl
dnl or like this:
dnl a.out:
dnl 32-bit ELF executable
dnl shared library dynamic path search:
dnl LD_LIBRARY_PATH enabled first
dnl SHLIB_PATH enabled second
dnl embedded path enabled third /usr/lib/hpux32:/opt/langtools/lib/hpux32
dnl shared library list:
dnl libc.so.1
dnl shared library binding:
dnl deferred
dnl global hash table disabled
dnl global hash table size 1103
dnl shared library mapped private disabled
dnl shared library segment merging disabled
dnl shared vtable support disabled
dnl explicit unloading disabled
dnl segments:
dnl index type address flags size
dnl 7 text 04000000 z---c- D (default)
dnl 8 data 40000000 ---m-- D (default)
dnl executable from stack: D (default)
dnl kernel assisted branch prediction enabled
dnl lazy swap allocation for dynamic segments disabled
dnl nulptr references disabled
dnl address space model: default
dnl caliper dynamic instrumentation disabled
dnl
LDDPOSTPROC="2>/dev/null | sed -e '1,/shared library list:/d' -e '/shared library binding:/,\$d' | sed -e 's,^.*[ ]\\([^ ][^ ]*\\)\$,\\1,' | sed -e 's,^.*/,,'"
;;
irix*)
LDDPROG="elfdump -Dl"
dnl The output of "elfdump -Dl program" looks like this:
dnl
dnl program:
dnl
dnl **** MIPS LIBLIST INFORMATION ****
dnl .liblist :
dnl [INDEX] Timestamp Checksum Flags Name Version
dnl [1] Oct 2 05:19:12 1999 0x867bf7a8 ----- libc.so.1 sgi1.0
dnl
LDDPOSTPROC="2>/dev/null | sed -n -e 's,^[[][0-9]*[]].* 0x[^ ]* [^ ][^ ]* \\([^ ][^ ]*\\).*\$,\\1,p' | sed -e 's,^.*/,,'"
;;
linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) # glibc-based systems
LDDPROG="ldd"
dnl The output of "ldd program" looks like this:
dnl libc.so.6 => /lib/libc.so.6 (0x4002d000)
dnl /lib/ld-linux.so.2 (0x40000000)
LDDPOSTPROC="2>/dev/null | sed -n -e 's,^ \\([^ ][^ ]*\\).*\$,\\1,p' | sed -e 's,^.*/,,'"
;;
osf*)
LDDPROG="odump -Dl"
dnl The output of "odump -Dl program" looks like this:
dnl
dnl ***LIBRARY LIST SECTION***
dnl Name Time-Stamp CheckSum Flags Version
dnl program:
dnl libc.so Dec 30 00:09:30 1997 0x5e955f9b 0 osf.1
dnl
LDDPOSTPROC="2>/dev/null | sed -n -e 's,^ \\([^ ][^ ]*\\).*,\\1,p' | sed -e '/^Name\$/d' | sed -e 's,^.*/,,'"
;;
solaris*)
LDDPROG="ldd"
dnl The output of "ldd program" looks like this:
dnl libc.so.1 => /usr/lib/libc.so.1
dnl libdl.so.1 => /usr/lib/libdl.so.1
dnl /usr/platform/SUNW,Ultra-5_10/lib/libc_psr.so.1
dnl The first sed collects the indented lines.
dnl The second sed extracts the left-hand part.
dnl The third sed removes directory specifications.
LDDPOSTPROC="2>/dev/null | sed -n -e 's,^ \\([^ ].*\\)\$,\\1,p' | sed -e 's, =>.*\$,,' | sed -e 's,^.*/,,'"
;;
esac
fi
fi
dnl Avoid locale dependencies.
if test "$LDDPROG" != ":"; then
LDDPROG="LC_ALL=C $LDDPROG"
fi
changequote([,])dnl
AC_SUBST([LDDPROG])
AC_SUBST([LDDPOSTPROC])
])
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