[Crash-utility] [PATCH v3 1/1] Support cross-compilation
lijiang
lijiang at redhat.com
Tue Dec 29 05:14:56 UTC 2020
Hi, Alexander
Thanks for the patch.
在 2020年11月08日 01:00, crash-utility-request at redhat.com 写道:
> Date: Fri, 6 Nov 2020 19:48:07 +0100
> From: Alexander Egorenkov <egorenar-dev at posteo.net>
> To: crash-utility at redhat.com
> Subject: [Crash-utility] [PATCH v3 1/1] Support cross-compilation
> Message-ID: <20201106184807.29574-1-egorenar-dev at posteo.net>
> Content-Type: text/plain; charset="US-ASCII"
>
> In order to support cross-compilation of crash-utilty,
> the configure tool compiled from configure.c must be built
> for the host architecture where the cross-compilation will run
> instead of the target architecture where the crash-utility shall run.
> Therefore, we need to support two C compilers in Maklefile,
> one for the host and one for the target. The old CC makefile variable
> shall represent the compiler for the target architecture and
> the new HOSTCC makefile variable shall represent the host compiler.
> Both variables differ only when a cross-compilation is performed.
> Furthermore, there must be a way to override the target architecture
> which is deduced from the preprocessor macros defined by the compiler
> used for the compilation of configure.c, because otherwise the configure
> tool will deduce host's architecture instead of the desired target.
> With the new preprocessor define CONF_DEFAULT_TARGET, it is possible to
> set the desired target architecture for the compiled crash-utility.
> When cross-compiling, set the makefile variable CROSS_COMPILE
> to the prefix of the cross-compiler and the default target
> architecture will be deduced from it, e.g. like this:
>
> make CROSS_COMPILE=s390x-linux-
>
After applied this patch, the cross build failed in Fedora as below:
[root at hpe-apollo-cn99xx-15-vm-21 crash]# make CROSS_COMPILE=s390x-linux-
...
rm -f ./libiberty.a pic/./libiberty.a
s390x-linux-ar rc ./libiberty.a \
./regex.o ./cplus-dem.o ./cp-demangle.o ./md5.o ./sha1.o ./alloca.o ./argv.o ./choose-temp.o ./concat.o ./cp-demint.o ./crc32.o ./dwarfnames.o ./dyn-string.o ./fdmatch.o ./fibheap.o ./filename_cmp.o ./floatformat.o ./fnmatch.o ./fopen_unlocked.o ./getopt.o ./getopt1.o ./getpwd.o ./getruntime.o ./hashtab.o ./hex.o ./lbasename.o ./lrealpath.o ./make-relative-prefix.o ./make-temp-file.o ./mkstemps.o ./objalloc.o ./obstack.o ./partition.o ./pexecute.o ./physmem.o ./pex-common.o ./pex-one.o ./pex-unix.o ./safe-ctype.o ./simple-object.o ./simple-object-coff.o ./simple-object-elf.o ./simple-object-mach-o.o ./simple-object-xcoff.o ./sort.o ./spaces.o ./splay-tree.o ./stack-limit.o ./strerror.o ./strsignal.o ./timeval-utils.o ./unlink-if-ordinary.o ./xatexit.o ./xexit.o ./xmalloc.o ./xmemdup.o ./xstrdup.o ./xstrerror.o ./xstrndup.o ./setproctitle.o
make[4]: s390x-linux-ar: Command not found
make[4]: *** [Makefile:247: libiberty.a] Error 127
make[3]: *** [Makefile:6996: all-libiberty] Error 2
make[2]: *** [Makefile:835: all] Error 2
crash build failed
make[1]: *** [Makefile:281: gdb_merge] Error 1
make: *** [Makefile:272: all] Error 2
[root at hpe-apollo-cn99xx-15-vm-21 crash]#
Can you help to check this patch again and do some coverage testing?
Thanks.
Lianbo
> and the default target architecture shall be S390X.
>
> Signed-off-by: Alexander Egorenkov <egorenar-dev at posteo.net>
> ---
>
> v2 -> v3:
> * Use CROSS_COMPILE makefile variable to pass cross-compiler prefix
>
> v1 -> v2:
> * Improved commit message
> * Added a note how to cross-compile crash-utilty to README
> * Moved CONF_CC makefile variable to correct place location
>
>
> Makefile | 53 +++++++++++++++++++++++++++++++++++++++++++++++++----
> README | 5 +++++
> configure.c | 39 +++------------------------------------
> 3 files changed, 57 insertions(+), 40 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index d185719..7185dcd 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -20,15 +20,60 @@
> PROGRAM=crash
>
> #
> -# Supported targets: X86 ALPHA PPC IA64 PPC64 SPARC64
> +# Supported targets: X86 X86_64 IA64 ALPHA PPC PPC64 ARM ARM64 SPARC64 MIPS S390 S390X
> # TARGET and GDB_CONF_FLAGS will be configured automatically by configure
> #
> TARGET=
> GDB_CONF_FLAGS=
>
> -ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
> +ifneq ($(CROSS_COMPILE),)
> +ARCH := $(shell echo $(CROSS_COMPILE) | sed 's:^.*/::g' | cut -d- -f1)
> +else
> +ARCH := $(shell uname -m)
> +endif
> +ARCH := $(shell echo $(ARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
> +
> +CC = $(CROSS_COMPILE)gcc
> +HOSTCC = gcc
> +
> ifeq (${ARCH}, ppc64)
> -CONF_FLAGS = -m64
> +CONF_FLAGS += -m64
> +endif
> +
> +ifeq (${ARCH}, i386)
> +CONF_DEFAULT_TARGET := X86
> +else ifeq (${ARCH}, x86_64)
> +CONF_DEFAULT_TARGET := X86_64
> +else ifeq (${ARCH}, ia64)
> +CONF_DEFAULT_TARGET := IA64
> +else ifeq (${ARCH}, alpha)
> +CONF_DEFAULT_TARGET := ALPHA
> +else ifeq (${ARCH}, ppc)
> +CONF_DEFAULT_TARGET := PPC
> +else ifeq (${ARCH}, ppc64)
> +CONF_DEFAULT_TARGET := PPC64
> +else ifeq (${ARCH}, ppc64le)
> +CONF_DEFAULT_TARGET := PPC64
> +else ifeq (${ARCH}, arm)
> +CONF_DEFAULT_TARGET := ARM
> +else ifeq (${ARCH}, aarch64)
> +CONF_DEFAULT_TARGET := ARM64
> +else ifeq (${ARCH}, mips)
> +CONF_DEFAULT_TARGET := MIPS
> +else ifeq (${ARCH}, sparc64)
> +CONF_DEFAULT_TARGET := SPARC64
> +else ifeq (${ARCH}, s390)
> +CONF_DEFAULT_TARGET := S390
> +else ifeq (${ARCH}, s390x)
> +CONF_DEFAULT_TARGET := S390X
> +else
> +$(error unsupported architecture ${ARCH})
> +endif
> +
> +CONF_FLAGS += -DCONF_DEFAULT_TARGET=${CONF_DEFAULT_TARGET}
> +
> +ifneq ($(CROSS_COMPILE),)
> +CONF_FLAGS += -DGDB_TARGET_DEFAULT="\"GDB_CONF_FLAGS=--host=$(shell echo $(CROSS_COMPILE) | sed -e 's:^.*/::g' -e 's/-$$//')\""
> endif
>
> #
> @@ -288,7 +333,7 @@ force:
>
> make_configure: force
> @rm -f configure
> - @${CC} ${CONF_FLAGS} -o configure configure.c ${WARNING_ERROR} ${WARNING_OPTIONS}
> + @${HOSTCC} ${CONF_FLAGS} -o configure configure.c ${WARNING_ERROR} ${WARNING_OPTIONS}
>
> clean: make_configure
> @./configure ${CONF_TARGET_FLAG} -q -b
> diff --git a/README b/README
> index bfbaef6..f5bd476 100644
> --- a/README
> +++ b/README
> @@ -100,6 +100,11 @@
> o On an x86_64 host, an x86_64 binary that can be used to analyze
> ppc64le dumpfiles may be built by typing "make target=PPC64".
>
> + To cross-compile the crash utility, set the makefile variable CROSS_COMPILE to
> + the prefix of the cross-compiler, e.g. like this:
> +
> + $ make CROSS_COMPILE=s390x-linux-
> +
> Traditionally when vmcores are compressed via the makedumpfile(8) facility
> the libz compression library is used, and by default the crash utility
> only supports libz. Recently makedumpfile has been enhanced to optionally
> diff --git a/configure.c b/configure.c
> index 7f6d19e..970a547 100644
> --- a/configure.c
> +++ b/configure.c
> @@ -154,7 +154,9 @@ void add_extra_lib(char *);
> #define TARGET_CFLAGS_MIPS_ON_X86_64 "TARGET_CFLAGS=-m32 -D_FILE_OFFSET_BITS=64"
> #define TARGET_CFLAGS_SPARC64 "TARGET_CFLAGS="
>
> +#ifndef GDB_TARGET_DEFAULT
> #define GDB_TARGET_DEFAULT "GDB_CONF_FLAGS="
> +#endif
> #define GDB_TARGET_ARM_ON_X86 "GDB_CONF_FLAGS=--target=arm-elf-linux"
> #define GDB_TARGET_ARM_ON_X86_64 "GDB_CONF_FLAGS=--target=arm-elf-linux CFLAGS=-m32"
> #define GDB_TARGET_X86_ON_X86_64 "GDB_CONF_FLAGS=--target=i686-pc-linux-gnu CFLAGS=-m32"
> @@ -349,42 +351,7 @@ get_current_configuration(struct supported_gdb_version *sp)
> static char buf[512];
> char *p;
>
> -#ifdef __alpha__
> - target_data.target = ALPHA;
> -#endif
> -#ifdef __i386__
> - target_data.target = X86;
> -#endif
> -#ifdef __powerpc__
> - target_data.target = PPC;
> -#endif
> -#ifdef __ia64__
> - target_data.target = IA64;
> -#endif
> -#ifdef __s390__
> - target_data.target = S390;
> -#endif
> -#ifdef __s390x__
> - target_data.target = S390X;
> -#endif
> -#ifdef __powerpc64__
> - target_data.target = PPC64;
> -#endif
> -#ifdef __x86_64__
> - target_data.target = X86_64;
> -#endif
> -#ifdef __arm__
> - target_data.target = ARM;
> -#endif
> -#ifdef __aarch64__
> - target_data.target = ARM64;
> -#endif
> -#ifdef __mips__
> - target_data.target = MIPS;
> -#endif
> -#ifdef __sparc_v9__
> - target_data.target = SPARC64;
> -#endif
> + target_data.target = CONF_DEFAULT_TARGET;
>
> set_initial_target(sp);
>
> -- 2.29.2
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