* [bug#47349] [PATCH] gnu: cross-base: Relax check for powerpc64le
2021-03-26 6:27 ` Chris Marusich
@ 2021-03-26 10:31 ` Andreas Enge
2021-03-26 14:33 ` Léo Le Bouter via Guix-patches via
1 sibling, 0 replies; 5+ messages in thread
From: Andreas Enge @ 2021-03-26 10:31 UTC (permalink / raw)
To: Chris Marusich; +Cc: 47349, Carl Dong
Hello Chris,
I have no idea about cross compilers, but it would certainly be nice if
the final gcc supported long doubles.
As a check, you can have a look at the log file for building gmp,
obtained with "guix build --log-file gmp". If you grep for "long double",
it should contain a line
checking for long double... yes
Hm, just "having" long double is maybe not all we want.
From the gcc documentation at https://gcc.gnu.org/install/configure.html:
--with-long-double-128
Specify if long double type should be 128-bit by default on selected GNU/Linux architectures. If using --without-long-double-128, long double will be by default 64-bit, the same as double type. When neither of these configure options are used, the default will be 128-bit long double when built against GNU C Library 2.4 and later, 64-bit long double otherwise.
Of course we would like long double to have 128 bits, since otherwise there
is no difference with double. And at least with the current gcc and a glibc
from 2006 or later, the flag should not be neeed.
On my x86_64 machine, sizeof(long double) is 16 bytes with gcc@10, 5 or 7.
Could you try to compile and run the trivial program
#include <stdio.h>
void main () {
printf ("long double %i\n", sizeof (long double));
}
and see what it outputs on powerpc?
Well, while --with-long-double-128 should not be needed since it should be
the default, you may as well add it to the flags, since it is the desired
behaviour.
Andreas
^ permalink raw reply [flat|nested] 5+ messages in thread* [bug#47349] [PATCH] gnu: cross-base: Relax check for powerpc64le
2021-03-26 6:27 ` Chris Marusich
2021-03-26 10:31 ` Andreas Enge
@ 2021-03-26 14:33 ` Léo Le Bouter via Guix-patches via
1 sibling, 0 replies; 5+ messages in thread
From: Léo Le Bouter via Guix-patches via @ 2021-03-26 14:33 UTC (permalink / raw)
To: Chris Marusich, Carl Dong; +Cc: 47349
[-- Attachment #1: Type: text/plain, Size: 26067 bytes --]
On Thu, 2021-03-25 at 23:27 -0700, Chris Marusich wrote:
> Hi people,
>
> Carl Dong <contact@carldong.me> writes:
>
> > * gnu/packages/cross-base.scm (cross-gcc-arguments): Check for
> > "powerpc64le-" prefix for "--with-long-double-128" instead of
> > matching
> > full target.
>
> This patch looks good to me. I confirmed it doesn't rebuild the
> world.
> We can apply it to master. I will do this in the next few days
> unless
> somebody else has further comments on this patch specifically.
>
> While reviewing this patch, I noticed that surprisingly, we do not
> use
> --with-long-double in the following places:
>
> - The gcc package (a GCC v7.5.0 native compiler) on powerpc64le-linux
> systems.
>
> - The gcc-final package (a GCC v7.5.0 native compiler) on
> powerpc64le-linux systems.
>
> - The %bootstrap-gcc package (a GCC v5.5.0 native compiler) on
> powerpc64le-linux systems.
>
> - The %gcc-static package (a GCC v5.5.0 native compiler), when
> cross-compiled for the powerpc64le-linux-gnu target on an x86_64-
> linux
> system. (Note that this is actually the same GCC that on
> powerpc64le-linux systems is known as %bootstrap-gcc.)
>
> Obviously, %bootstrap-gcc is good enough to build gcc-final, and
> gcc-final is good enough to build various things, including GNU Hello
> and GNU Guix itself. We have verified this. However, Leo, do you
> think
> it would be a good idea to add --with-long-double to the gcc and
> gcc-final package definitions on powerpc64le-linux, anyway? Perhaps
> it
> actually is needed, but we just haven't yet encountered the problems
> that it would solve. What do you think, Leo?
>
> You can inspect the packages to see this yourself, but you can also
> ask
> Guix to tell you about the configure options. Here is what Guix says
> about the configure options for the gcc and gcc-final packages on a
> powerpc64le-linux system using commit
> b0eb525ddba77420ff8c0930b9173b10f9ae342d:
>
> --8<---------------cut here---------------start------------->8---
> scheme@(guix-user)> ,pp (bag-arguments (package->bag (@ (gnu packages
> gcc) gcc)))
> $3 = (#:system
> "powerpc64le-linux"
> #:out-of-source?
> #t
> #:configure-flags
> `("--enable-plugin"
> "--enable-languages=c,c++"
> "--disable-multilib"
> "--with-system-zlib"
> "--disable-libstdcxx-pch"
> "--with-local-prefix=/no-gcc-local-prefix"
> ,(string-append
> "--with-gxx-include-dir="
> (assoc-ref %outputs "out")
> "/include/c++")
> ,(let ((libc (assoc-ref %build-inputs "libc")))
> (if libc
> (string-append
> "--with-native-system-header-dir="
> libc
> "/include")
> "--without-headers")))
> #:make-flags
> (let* ((libc (assoc-ref %build-inputs "libc"))
> (libc-native
> (or (assoc-ref %build-inputs "libc-native") libc)))
> `(,@(if libc
> (list (string-append
> "LDFLAGS_FOR_TARGET="
> "-B"
> libc
> "/lib "
> "-Wl,-dynamic-linker "
> "-Wl,"
> libc
> "/lib/ld64.so.2"))
> '())
> ,(string-append
> "LDFLAGS="
> "-Wl,-rpath="
> libc-native
> "/lib "
> "-Wl,-dynamic-linker "
> "-Wl,"
> libc-native
> "/lib/ld64.so.2")
> ,(string-append "BOOT_CFLAGS=-O2 " "-g0")))
> #:tests?
> #f
> #:phases
> (modify-phases
> %standard-phases
> (add-before
> 'configure
> 'pre-configure
> (lambda* (#:key inputs outputs #:allow-other-keys)
> (let ((libdir
> (or (assoc-ref outputs "lib")
> (assoc-ref outputs "out")))
> (libc (assoc-ref inputs "libc")))
> (when libc
> (for-each
> (lambda (x)
> (substitute*
> (find-files
> "gcc/config"
> "^(linux|gnu|sysv4)(64|-elf|-eabi)?\\.h$")
> (("(#define
> (GLIBC|GNU_USER)_DYNAMIC_LINKER.*)\\\\\n$"
> _
> line)
> line)))
> '(1 2 3))
> (substitute*
> (find-files
> "gcc/config"
> "^(linux|gnu|sysv4)(64|-elf|-eabi)?\\.h$")
> (("#define (GLIBC|GNU_USER)_DYNAMIC_LINKER([^
> \t]*).*$"
> _
> gnu-user
> suffix)
> (format
> #f
> "#define ~a_DYNAMIC_LINKER~a \"~a\"~%"
> gnu-user
> suffix
> (string-append libc "/lib/ld64.so.2"))))
> (substitute*
> (find-files "gcc/config" "^gnu-user.*\\.h$")
> (("#define GNU_USER_TARGET_LIB_SPEC (.*)$"
> _
> suffix)
> (format
> #f
> "#define GNU_USER_TARGET_LIB_SPEC \"-L~a/lib
> %{!static:-rpath=~a/lib %{!static-libgcc:-rpath=~a/lib -lgcc_s}} \"
> ~a"
> libc
> libc
> libdir
> suffix))
> (("#define GNU_USER_TARGET_STARTFILE_SPEC.*$"
> line)
> (format
> #f
> "#define STANDARD_STARTFILE_PREFIX_1
> \"~a/lib\"\n#define STANDARD_STARTFILE_PREFIX_2 \"\"\n~a"
> libc
> line)))
> (substitute*
> "gcc/config/rs6000/sysv4.h"
> (("#define LIB_LINUX_SPEC (.*)$" _ suffix)
> (format
> #f
> "#define LIB_LINUX_SPEC \"-L~a/lib %{!static:-
> rpath=~a/lib %{!static-libgcc:-rpath=~a/lib -lgcc_s}} \" ~a"
> libc
> libc
> libdir
> suffix))
> (("#define\tSTARTFILE_LINUX_SPEC.*$" line)
> (format
> #f
> "#define STANDARD_STARTFILE_PREFIX_1
> \"~a/lib\"\n#define STANDARD_STARTFILE_PREFIX_2 \"\"\n~a"
> libc
> line))))
> (when (file-exists? "gcc/config/rs6000")
> (substitute*
> (find-files "gcc/config/rs6000")
> (("/lib64") "/lib")))
> (substitute*
> "fixincludes/fixincl.x"
> (("static char const sed_cmd_z\\[\\] =.*;")
> "static char const sed_cmd_z[] = \"sed\";"))
> (when (file-exists? "gcc/config/aarch64")
> (substitute*
> "gcc/config/aarch64/t-aarch64-linux"
> (("lib64") "lib")))
> (when (file-exists? "libbacktrace")
> (substitute*
> "libbacktrace/configure"
> (("WARN_FLAGS=(.*)-Werror" _ flags)
> (string-append "WARN_FLAGS=" flags)))
> (when (file-exists? "libsanitizer/libbacktrace")
> (substitute*
> "libsanitizer/libbacktrace/Makefile.in"
> (("-Werror") ""))))
> (substitute*
> "libstdc++-v3/src/Makefile.in"
> (("^OPT_LDFLAGS = ")
> "OPT_LDFLAGS = -Wl,-rpath=$(libdir) "))
> (substitute*
> "libstdc++-v3/python/Makefile.in"
> (("pythondir = .*$")
> (string-append
> "pythondir = "
> libdir
> "/share"
> "/gcc-$(gcc_version)/python\n")))
> (substitute*
> "gcc/config.in"
> (("PREFIX_INCLUDE_DIR")
> "PREFIX_INCLUDE_DIR_isnt_necessary_here"))
> #t)))
> (add-after
> 'configure
> 'post-configure
> (lambda _
> (substitute*
> "Makefile"
> (("^TOPLEVEL_CONFIGURE_ARGUMENTS=(.*)$" _ rest)
> "TOPLEVEL_CONFIGURE_ARGUMENTS=\n"))
> #t))))
> scheme@(guix-user)> ,pp (bag-arguments (package->bag (@@ (gnu
> packages commencement) gcc-final)))
> $4 = (#:system
> "powerpc64le-linux"
> #:guile
> #<package guile-bootstrap@2.0 gnu/packages/bootstrap.scm:478
> 7fff75bdcf00>
> #:allowed-references
> ("out"
> "lib"
> #<package zlib@1.2.11 gnu/packages/commencement.scm:3562
> 7fff692745a0>
> #<package glibc@2.31 gnu/packages/commencement.scm:3462
> 7fff69274820>
> #<package bash-static@5.0.16 gnu/packages/commencement.scm:3402
> 7fff69274960>)
> #:validate-runpath?
> #f
> #:out-of-source?
> #t
> #:configure-flags
> `("--enable-plugin"
> "--enable-languages=c,c++"
> "--disable-multilib"
> "--with-system-zlib"
> "--disable-libstdcxx-pch"
> "--with-local-prefix=/no-gcc-local-prefix"
> ,(string-append
> "--with-gxx-include-dir="
> (assoc-ref %outputs "out")
> "/include/c++")
> ,(let ((libc (assoc-ref %build-inputs "libc")))
> (if libc
> (string-append
> "--with-native-system-header-dir="
> libc
> "/include")
> "--without-headers")))
> #:make-flags
> (let ((zlib (assoc-ref %build-inputs "zlib")))
> (map (lambda (flag)
> (if (string-prefix? "LDFLAGS=" flag)
> (string-append
> flag
> " -L"
> (assoc-ref %build-inputs "libstdc++")
> "/lib -L"
> zlib
> "/lib -Wl,-rpath="
> zlib
> "/lib")
> flag))
> (let* ((libc (assoc-ref %build-inputs "libc"))
> (libc-native
> (or (assoc-ref %build-inputs "libc-native") libc)))
> `(,@(if libc
> (list (string-append
> "LDFLAGS_FOR_TARGET="
> "-B"
> libc
> "/lib "
> "-Wl,-dynamic-linker "
> "-Wl,"
> libc
> "/lib/ld64.so.2"))
> '())
> ,(string-append
> "LDFLAGS="
> "-Wl,-rpath="
> libc-native
> "/lib "
> "-Wl,-dynamic-linker "
> "-Wl,"
> libc-native
> "/lib/ld64.so.2")
> ,(string-append "BOOT_CFLAGS=-O2 " "-g0")))))
> #:tests?
> #f
> #:phases
> (modify-phases
> (modify-phases
> %standard-phases
> (add-before
> 'configure
> 'pre-configure
> (lambda* (#:key inputs outputs #:allow-other-keys)
> (let ((libdir
> (or (assoc-ref outputs "lib")
> (assoc-ref outputs "out")))
> (libc (assoc-ref inputs "libc")))
> (when libc
> (for-each
> (lambda (x)
> (substitute*
> (find-files
> "gcc/config"
> "^(linux|gnu|sysv4)(64|-elf|-eabi)?\\.h$")
> (("(#define
> (GLIBC|GNU_USER)_DYNAMIC_LINKER.*)\\\\\n$"
> _
> line)
> line)))
> '(1 2 3))
> (substitute*
> (find-files
> "gcc/config"
> "^(linux|gnu|sysv4)(64|-elf|-eabi)?\\.h$")
> (("#define (GLIBC|GNU_USER)_DYNAMIC_LINKER([^
> \t]*).*$"
> _
> gnu-user
> suffix)
> (format
> #f
> "#define ~a_DYNAMIC_LINKER~a \"~a\"~%"
> gnu-user
> suffix
> (string-append libc "/lib/ld64.so.2"))))
> (substitute*
> (find-files "gcc/config" "^gnu-user.*\\.h$")
> (("#define GNU_USER_TARGET_LIB_SPEC (.*)$"
> _
> suffix)
> (format
> #f
> "#define GNU_USER_TARGET_LIB_SPEC \"-L~a/lib
> %{!static:-rpath=~a/lib %{!static-libgcc:-rpath=~a/lib -lgcc_s}} \"
> ~a"
> libc
> libc
> libdir
> suffix))
> (("#define GNU_USER_TARGET_STARTFILE_SPEC.*$"
> line)
> (format
> #f
> "#define STANDARD_STARTFILE_PREFIX_1
> \"~a/lib\"\n#define STANDARD_STARTFILE_PREFIX_2 \"\"\n~a"
> libc
> line)))
> (substitute*
> "gcc/config/rs6000/sysv4.h"
> (("#define LIB_LINUX_SPEC (.*)$" _ suffix)
> (format
> #f
> "#define LIB_LINUX_SPEC \"-L~a/lib %{!static:-
> rpath=~a/lib %{!static-libgcc:-rpath=~a/lib -lgcc_s}} \" ~a"
> libc
> libc
> libdir
> suffix))
> (("#define\tSTARTFILE_LINUX_SPEC.*$" line)
> (format
> #f
> "#define STANDARD_STARTFILE_PREFIX_1
> \"~a/lib\"\n#define STANDARD_STARTFILE_PREFIX_2 \"\"\n~a"
> libc
> line))))
> (when (file-exists? "gcc/config/rs6000")
> (substitute*
> (find-files "gcc/config/rs6000")
> (("/lib64") "/lib")))
> (substitute*
> "fixincludes/fixincl.x"
> (("static char const sed_cmd_z\\[\\] =.*;")
> "static char const sed_cmd_z[] = \"sed\";"))
> (when (file-exists? "gcc/config/aarch64")
> (substitute*
> "gcc/config/aarch64/t-aarch64-linux"
> (("lib64") "lib")))
> (when (file-exists? "libbacktrace")
> (substitute*
> "libbacktrace/configure"
> (("WARN_FLAGS=(.*)-Werror" _ flags)
> (string-append "WARN_FLAGS=" flags)))
> (when (file-exists? "libsanitizer/libbacktrace")
> (substitute*
> "libsanitizer/libbacktrace/Makefile.in"
> (("-Werror") ""))))
> (substitute*
> "libstdc++-v3/src/Makefile.in"
> (("^OPT_LDFLAGS = ")
> "OPT_LDFLAGS = -Wl,-rpath=$(libdir) "))
> (substitute*
> "libstdc++-v3/python/Makefile.in"
> (("pythondir = .*$")
> (string-append
> "pythondir = "
> libdir
> "/share"
> "/gcc-$(gcc_version)/python\n")))
> (substitute*
> "gcc/config.in"
> (("PREFIX_INCLUDE_DIR")
> "PREFIX_INCLUDE_DIR_isnt_necessary_here"))
> #t)))
> (add-after
> 'configure
> 'post-configure
> (lambda _
> (substitute*
> "Makefile"
> (("^TOPLEVEL_CONFIGURE_ARGUMENTS=(.*)$" _ rest)
> "TOPLEVEL_CONFIGURE_ARGUMENTS=\n"))
> #t)))
> (add-after
> 'unpack
> 'unpack-gmp&co
> (lambda* (#:key inputs #:allow-other-keys)
> (let ((gmp (assoc-ref %build-inputs "gmp-source"))
> (mpfr (assoc-ref %build-inputs "mpfr-source"))
> (mpc (assoc-ref %build-inputs "mpc-source")))
> (for-each
> (lambda (source) (invoke "tar" "xvf" source))
> (list gmp mpfr mpc))
> (symlink "gmp-6.0.0" "gmp")
> (symlink "mpfr-4.0.2" "mpfr")
> (symlink "mpc-1.1.0" "mpc")
> #t)))))
> scheme@(guix-user)>
> --8<---------------cut here---------------end--------------->8---
>
> And here is what Guix says about the configure options for %gcc-
> static,
> when cross-compiled for powerpc64le-linux-gnu on an x86_64-linux
> system
> using commit 662e7e28d576ada91fc9dec7d27c100666114f03, which is the
> one
> we used to build the powerpc64le-linux bootstrap binaries:
>
> --8<---------------cut here---------------start------------->8---
> scheme@(guix-user)> package->bag
> $1 = #<procedure package->bag (package #:optional system target #:key
> graft?)>
> scheme@(guix-user)> ,pp (bag-arguments (package->bag (@@ (gnu
> packages make-bootstrap) %gcc-static) "x86_64-linux" "powerpc64le-
> linux-gnu"))
> $2 = (#:system
> "x86_64-linux"
> #:target
> "powerpc64le-linux-gnu"
> #:modules
> ((srfi srfi-1)
> (srfi srfi-26)
> (ice-9 regex)
> (guix build gnu-build-system)
> (guix build utils)
> (guix build gremlin)
> (guix elf))
> #:out-of-source?
> #t
> #:configure-flags
> (append
> (list "--disable-bootstrap"
> "--with-stage1-ldflags=-static"
> "--enable-languages=c,c++"
> "--disable-lto"
> "--disable-shared"
> "--disable-plugin"
> "--disable-libmudflap"
> "--disable-libatomic"
> "--disable-libsanitizer"
> "--disable-libitm"
> "--disable-libgomp"
> "--disable-libcilkrts"
> "--disable-libvtv"
> "--disable-libssp"
> "--disable-libquadmath")
> (remove
> (cut string-match
> "--(.*plugin|enable-languages)"
> <>)
> `("--enable-plugin"
> "--enable-languages=c,c++"
> "--disable-multilib"
> "--with-system-zlib"
> "--disable-libstdcxx-pch"
> "--with-local-prefix=/no-gcc-local-prefix"
> ,(string-append
> "--with-gxx-include-dir="
> (assoc-ref %outputs "out")
> "/include/c++")
> ,(let ((libc (assoc-ref %build-inputs "libc")))
> (if libc
> (string-append
> "--with-native-system-header-dir="
> libc
> "/include")
> "--without-headers"))
> "CC_FOR_TARGET=powerpc64le-linux-gnu-gcc"
> "CXX_FOR_TARGET=powerpc64le-linux-gnu-g++"
> "LD_FOR_TARGET=powerpc64le-linux-gnu-ld"
> "AR_FOR_TARGET=powerpc64le-linux-gnu-ar"
> "NM_FOR_TARGET=powerpc64le-linux-gnu-nm"
> "OBJDUMP_FOR_TARGET=powerpc64le-linux-gnu-objdump"
> "RANLIB_FOR_TARGET=powerpc64le-linux-gnu-ranlib"
> "STRIP_FOR_TARGET=powerpc64le-linux-gnu-strip")))
> #:make-flags
> '("CFLAGS=-g0 -O2")
> #:tests?
> #f
> #:phases
> (modify-phases
> (modify-phases
> %standard-phases
> (add-before
> 'configure
> 'pre-configure
> (lambda* (#:key inputs outputs #:allow-other-keys)
> (let ((libdir
> (string-append
> (or (assoc-ref outputs "lib")
> (assoc-ref outputs "out"))
> "/"
> "powerpc64le-linux-gnu"))
> (libc (assoc-ref inputs "libc")))
> (when libc
> (for-each
> (lambda (x)
> (substitute*
> (find-files
> "gcc/config"
> "^(linux|gnu|sysv4)(64|-elf|-eabi)?\\.h$")
> (("(#define
> (GLIBC|GNU_USER)_DYNAMIC_LINKER.*)\\\\\n$"
> _
> line)
> line)))
> '(1 2 3))
> (substitute*
> (find-files
> "gcc/config"
> "^(linux|gnu|sysv4)(64|-elf|-eabi)?\\.h$")
> (("#define (GLIBC|GNU_USER)_DYNAMIC_LINKER([^
> \t]*).*$"
> _
> gnu-user
> suffix)
> (format
> #f
> "#define ~a_DYNAMIC_LINKER~a \"~a\"~%"
> gnu-user
> suffix
> (string-append libc "/lib/ld64.so.2"))))
> (substitute*
> (find-files "gcc/config" "^gnu-user.*\\.h$")
> (("#define GNU_USER_TARGET_LIB_SPEC (.*)$"
> _
> suffix)
> (format
> #f
> "#define GNU_USER_TARGET_LIB_SPEC \"-L~a/lib
> %{!static:-rpath=~a/lib %{!static-libgcc:-rpath=~a/lib -lgcc_s}} \"
> ~a"
> libc
> libc
> libdir
> suffix))
> (("#define GNU_USER_TARGET_STARTFILE_SPEC.*$"
> line)
> (format
> #f
> "#define STANDARD_STARTFILE_PREFIX_1
> \"~a/lib\"\n#define STANDARD_STARTFILE_PREFIX_2 \"\"\n~a"
> libc
> line)))
> (substitute*
> "gcc/config/rs6000/sysv4.h"
> (("#define LIB_LINUX_SPEC (.*)$" _ suffix)
> (format
> #f
> "#define LIB_LINUX_SPEC \"-L~a/lib %{!static:-
> rpath=~a/lib %{!static-libgcc:-rpath=~a/lib -lgcc_s}} \" ~a"
> libc
> libc
> libdir
> suffix))
> (("#define\tSTARTFILE_LINUX_SPEC.*$" line)
> (format
> #f
> "#define STANDARD_STARTFILE_PREFIX_1
> \"~a/lib\"\n#define STANDARD_STARTFILE_PREFIX_2 \"\"\n~a"
> libc
> line))))
> (substitute*
> "fixincludes/fixincl.x"
> (("static char const sed_cmd_z\\[\\] =.*;")
> "static char const sed_cmd_z[] = \"sed\";"))
> (when (file-exists? "gcc/config/aarch64")
> (substitute*
> "gcc/config/aarch64/t-aarch64-linux"
> (("lib64") "lib")))
> (when (file-exists? "libbacktrace")
> (substitute*
> "libbacktrace/configure"
> (("WARN_FLAGS=(.*)-Werror" _ flags)
> (string-append "WARN_FLAGS=" flags)))
> (when (file-exists? "libsanitizer/libbacktrace")
> (substitute*
> "libsanitizer/libbacktrace/Makefile.in"
> (("-Werror") ""))))
> (substitute*
> "libstdc++-v3/src/Makefile.in"
> (("^OPT_LDFLAGS = ")
> "OPT_LDFLAGS = -Wl,-rpath=$(libdir) "))
> (substitute*
> "libstdc++-v3/python/Makefile.in"
> (("pythondir = .*$")
> (string-append
> "pythondir = "
> libdir
> "/share"
> "/gcc-$(gcc_version)/python\n")))
> (substitute*
> "gcc/config.in"
> (("PREFIX_INCLUDE_DIR")
> "PREFIX_INCLUDE_DIR_isnt_necessary_here"))
> #t)))
> (add-after
> 'configure
> 'post-configure
> (lambda _
> (substitute*
> "Makefile"
> (("^TOPLEVEL_CONFIGURE_ARGUMENTS=(.*)$" _ rest)
> "TOPLEVEL_CONFIGURE_ARGUMENTS=\n"))
> #t)))
> (add-after
> 'pre-configure
> 'remove-lgcc_s
> (lambda _
> (substitute*
> (cons "gcc/config/rs6000/sysv4.h"
> (find-files "gcc/config" "^gnu-user.*\\.h$"))
> ((" -lgcc_s}}") "}}"))
> #t)))
> #:guile
> #f)
> scheme@(guix-user)>
> --8<---------------cut here---------------end--------------->8---
>
> As you can see, --with-long-double-128 is missing in all three cases.
> And yet, the packages appear to work correctly. I do not know why,
> but
> I wonder if perhaps we should add --with-long-double-128 for gcc and
> gcc-static on powerpc64le-linux.
>
> A thought occurred to me: can we remove the --with-long-double-128
> from
> cross-base.scm and commencement.scm? As an experiment, I have tried
> removing it, and I can confirm that we do need it in both places.
> Removing it from cross-base.scm breaks the ability to create
> cross-compilers for the powerpc64le-linux-gnu target, and removing it
> from commencement.scm breaks the ability to build essentially
> anything
> on powerpc64le-linux. The failure mode in both cases is similar; in
> any
> case, we do need it in both of those places.
>
> I just don't understand why we apparently do NOT need this option in
> gcc, gcc-final, and %bootstrap-gcc on powerpc64le-linux. Like I
> said...maybe it really IS required there, too, but we just haven't
> encountered any problems yet... I don't know, and would welcome your
> thoughts.
>
> --
> Chris
Nice tricks to display package definitions, thanks for sharing ways to
do that!
I would say we wait for actual problems before trying to fix anything,
the switch is only needed for compiling Glibc AIUI.
Léo
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