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elfutils: towards uClibc support: argp-standalone usage

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elfutils uses the argp family of functions, that isn't available in
uClibc. So, we add a dependency on argp-standalone if building with
uClibc, and modify elfutils source code to link against argp if
needed.

Heavily based from work done by Stefan Fröberg, but with many further
modifications by Thomas Petazzoni.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni 2013-01-06 05:22:49 +00:00 committed by Peter Korsgaard
parent eb6cf30033
commit 8e6c06fb11
3 changed files with 100 additions and 0 deletions
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4
package/elfutils/Config.in
View File

@ -8,6 +8,10 @@ config BR2_PACKAGE_ELFUTILS
depends on BR2_TOOLCHAIN_EXTERNAL_GLIBC || \
BR2_TOOLCHAIN_CTNG_glibc || \
BR2_TOOLCHAIN_CTNG_eglibc
select BR2_PACKAGE_ARGP_STANDALONE if \
BR2_TOOLCHAIN_BUILDROOT || \
BR2_TOOLCHAIN_CTNG_uClibc || \
BR2_TOOLCHAIN_EXTERNAL_UCLIBC
help
Libraries/utilities to handle ELF objects (drop in
replacement for libelf).

92
package/elfutils/elfutils-02-argp-support.patch Normal file
View File

@ -0,0 +1,92 @@
Allow the usage of an external implementation of the argp functions
uClibc lack the argp family of functions that glibc has. Therefore, we
add a check in the configure script to see if argp_parse is available
in the C library. If not, we look if it is available in the additional
'argp' library. If so, we link against that library. If not, we error
out.
This allows to build elfutils against uClibc with an external argp
library.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -269,6 +269,13 @@
enable_progs=yes)
AM_CONDITIONAL(ENABLE_PROGS, test "$enable_progs" = yes)
+AC_CHECK_FUNC([argp_parse])
+if test "$ac_cv_func_argp_parse" != yes; then
+ AC_CHECK_LIB([argp],[argp_parse],ARGP_LIBS=-largp,
+ AC_MSG_ERROR([No argp_parse function available.]))
+fi
+AC_SUBST(ARGP_LIBS)
+
dnl Test for zlib and bzlib, gives ZLIB/BZLIB .am
dnl conditional and config.h USE_ZLIB/USE_BZLIB #define.
save_LIBS="$LIBS"
Index: b/src/Makefile.am
===================================================================
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -98,26 +98,29 @@
# Buggy old compilers.
readelf_no_Werror = yes
-readelf_LDADD = $(libdw) $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl
+readelf_LDADD = $(libdw) $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl \
+ $(ARGP_LIBS)
nm_LDADD = $(libdw) $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl \
- $(demanglelib)
-size_LDADD = $(libelf) $(libeu) $(libmudflap)
-strip_LDADD = $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl
-ld_LDADD = $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl
+ $(demanglelib) $(ARGP_LIBS)
+size_LDADD = $(libelf) $(libeu) $(libmudflap) $(ARGP_LIBS)
+strip_LDADD = $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl $(ARGP_LIBS)
+ld_LDADD = $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl $(ARGP_LIBS)
if NATIVE_LD
# -ldl is always needed for libebl.
ld_LDADD += libld_elf.a
endif
ld_LDFLAGS = -rdynamic
-elflint_LDADD = $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl
-findtextrel_LDADD = $(libdw) $(libelf) $(libmudflap)
-addr2line_LDADD = $(libdw) $(libelf) $(libmudflap)
-elfcmp_LDADD = $(libebl) $(libelf) $(libmudflap) -ldl
-objdump_LDADD = $(libasm) $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl
-ranlib_LDADD = libar.a $(libelf) $(libeu) $(libmudflap)
-strings_LDADD = $(libelf) $(libeu) $(libmudflap)
-ar_LDADD = libar.a $(libelf) $(libeu) $(libmudflap)
-unstrip_LDADD = $(libebl) $(libelf) $(libdw) $(libeu) $(libmudflap) -ldl
+elflint_LDADD = $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl $(ARGP_LIBS)
+findtextrel_LDADD = $(libdw) $(libelf) $(libmudflap) $(ARGP_LIBS)
+addr2line_LDADD = $(libdw) $(libelf) $(libmudflap) $(ARGP_LIBS)
+elfcmp_LDADD = $(libebl) $(libelf) $(libmudflap) -ldl $(ARGP_LIBS)
+objdump_LDADD = $(libasm) $(libebl) $(libelf) $(libeu) $(libmudflap) -ldl \
+ $(ARGP_LIBS)
+ranlib_LDADD = libar.a $(libelf) $(libeu) $(libmudflap) $(ARGP_LIBS)
+strings_LDADD = $(libelf) $(libeu) $(libmudflap) $(ARGP_LIBS)
+ar_LDADD = libar.a $(libelf) $(libeu) $(libmudflap) $(ARGP_LIBS)
+unstrip_LDADD = $(libebl) $(libelf) $(libdw) $(libeu) $(libmudflap) -ldl \
+ $(ARGP_LIBS)
ldlex.o: ldscript.c
ldlex_no_Werror = yes
Index: b/libdw/Makefile.am
===================================================================
--- a/libdw/Makefile.am
+++ b/libdw/Makefile.am
@@ -111,7 +111,7 @@
-Wl,--enable-new-dtags,-rpath,$(pkglibdir) \
-Wl,--version-script,$<,--no-undefined \
-Wl,--whole-archive $(filter-out $<,$^) -Wl,--no-whole-archive\
- -ldl $(zip_LIBS)
+ -ldl $(zip_LIBS) $(ARGP_LIBS)
if readelf -d $@ | fgrep -q TEXTREL; then exit 1; fi
ln -fs $@ $@.$(VERSION)

4
package/elfutils/elfutils.mk
View File

@ -25,6 +25,10 @@ ELFUTILS_CONF_ENV += \
CPPFLAGS="$(filter-out -D_FILE_OFFSET_BITS=64,$(TARGET_CPPFLAGS))"
endif
ifeq ($(BR2_TOOLCHAIN_BUILDROOT)$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC)$(BR2_TOOLCHAIN_CTNG_uClibc),y)
ELFUTILS_DEPENDENCIES += argp-standalone
endif
ifeq ($(BR2_PACKAGE_ZLIB),y)
ELFUTILS_DEPENDENCIES += zlib
ELFUTILS_CONF_OPT += --with-zlib