Hi! Are you sure this is necessary? In Void Linux, we cross compile elfutils for arm and aarch64 without any issue, and I have built it a few times for powerpc as well.
On Wed May 26, 2021 at 4:32 AM -03, Petr Ovtchenkov wrote: > Possible problem with out-of-tree build expected > --- > Makefile.am | 2 +- > configure.ac | 6 ++++++ > lib-host/Makefile.am | 47 ++++++++++++++++++++++++++++++++++++++++++++ > libcpu/Makefile.am | 11 +++++++++++ > 4 files changed, 65 insertions(+), 1 deletion(-) > create mode 100644 lib-host/Makefile.am > > diff --git a/Makefile.am b/Makefile.am > index 9c47afa9..b93839ec 100644 > --- a/Makefile.am > +++ b/Makefile.am > @@ -26,7 +26,7 @@ AM_MAKEFLAGS = --no-print-directory > > pkginclude_HEADERS = version.h > > -SUBDIRS = config lib libelf libcpu backends libebl libdwelf libdwfl > libdw \ > +SUBDIRS = config lib lib-host libelf libcpu backends libebl libdwelf > libdwfl libdw \ > libasm debuginfod src po doc tests > > EXTRA_DIST = elfutils.spec GPG-KEY NOTES CONTRIBUTING \ > diff --git a/configure.ac b/configure.ac > index b348a717..432b961a 100644 > --- a/configure.ac > +++ b/configure.ac > @@ -88,6 +88,7 @@ AS_IF([test "$use_locks" = yes], > AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.]) > > AC_PROG_CC > +AX_PROG_CC_FOR_BUILD > AC_PROG_RANLIB > AC_PROG_YACC > AM_PROG_LEX > @@ -96,6 +97,8 @@ m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) > AC_CHECK_TOOL([READELF], [readelf]) > AC_CHECK_TOOL([NM], [nm]) > > +AM_CONDITIONAL([CROSS], [test "x$cross_compiling" = xyes]) > + > # We use -std=gnu99 but have explicit checks for some language > constructs > # and GNU extensions since some compilers claim GNU99 support, but don't > # really support all language extensions. In particular we need > @@ -593,6 +596,9 @@ AC_CONFIG_FILES([doc/Makefile]) > dnl Support library. > AC_CONFIG_FILES([lib/Makefile]) > > +dnl Support library. > +AC_CONFIG_FILES([lib-host/Makefile]) > + > dnl ELF library. > AC_CONFIG_FILES([libelf/Makefile]) > > diff --git a/lib-host/Makefile.am b/lib-host/Makefile.am > new file mode 100644 > index 00000000..9316c8ed > --- /dev/null > +++ b/lib-host/Makefile.am > @@ -0,0 +1,47 @@ > +## Process this file with automake to create Makefile.in > +## > +## Copyright (C) 1996-2011 Red Hat, Inc. > +## This file is part of elfutils. > +## > +## This file is free software; you can redistribute it and/or modify > +## it under the terms of either > +## > +## * the GNU Lesser General Public License as published by the Free > +## Software Foundation; either version 3 of the License, or (at > +## your option) any later version > +## > +## or > +## > +## * the GNU General Public License as published by the Free > +## Software Foundation; either version 2 of the License, or (at > +## your option) any later version > +## > +## or both in parallel, as here. > +## > +## elfutils is distributed in the hope that it will be useful, but > +## WITHOUT ANY WARRANTY; without even the implied warranty of > +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > +## General Public License for more details. > +## > +## You should have received copies of the GNU General Public License > and > +## the GNU Lesser General Public License along with this program. If > +## not, see <http://www.gnu.org/licenses/>. > +## > +if CROSS > + > +include $(top_srcdir)/config/eu.am > +AM_CFLAGS += $(fpic_CFLAGS) > +AM_CPPFLAGS += -D_GNU_SOURCE -I$(srcdir)/../lib -I$(srcdir)/../libelf > + > +noinst_LIBRARIES = libeu.a > + > +$(libeu_a_OBJECTS): CC=${CC_FOR_BUILD} > + > +libeu_a_SOURCES = ../lib/xstrdup.c ../lib/xstrndup.c ../lib/xmalloc.c > ../lib/next_prime.c \ > + ../lib/crc32.c ../lib/crc32_file.c \ > + ../lib/color.c ../lib/printversion.c > + > +if !GPROF > +xmalloc_CFLAGS = -ffunction-sections > +endif > +endif > diff --git a/libcpu/Makefile.am b/libcpu/Makefile.am > index 43844ecf..5086f8be 100644 > --- a/libcpu/Makefile.am > +++ b/libcpu/Makefile.am > @@ -27,6 +27,13 @@ > ## the GNU Lesser General Public License along with this program. If > ## not, see <http://www.gnu.org/licenses/>. > ## > + > +if CROSS > +i386_gendis_LINK = ${CC_FOR_BUILD} ${LDFLAGS} -o $@ > + > +$(i386_gendis_OBJECTS): CC=${CC_FOR_BUILD} > +endif Isn't this hardcoding an assumption that the build machine is x86? > + > include $(top_srcdir)/config/eu.am > AM_CPPFLAGS += -I$(srcdir)/../libelf -I$(srcdir)/../libebl \ > -I$(srcdir)/../libdw -I$(srcdir)/../libasm > @@ -79,7 +86,11 @@ endif > > i386_lex_no_Werror = yes > > +if CROSS > +libeu = ../lib-host/libeu.a > +else > libeu = ../lib/libeu.a > +endif > > i386_lex_CFLAGS = -Wno-unused-label -Wno-unused-function > -Wno-sign-compare \ > -Wno-implicit-fallthrough > -- > 2.29.2.1.g08c1adf7b9
