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gnu: gcc: Really always link against libgcc_s.so.

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* gnu/packages/gcc.scm (gcc-4.7): Add snippet to add -lgcc_s to the
  "lib" spec.  Remove --as-needed trick from 65d3b7c: it had no effect
  in cases where we have !static-libgcc && !shared-libgcc.
This commit is contained in:
Ludovic Courtès 2013-11-18 14:06:47 +01:00
parent 0129c94832
commit a7bf595fff
1 changed files with 7 additions and 16 deletions
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23
gnu/packages/gcc.scm
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@ -161,11 +161,14 @@ (define-public gcc-4.7
(substitute* (find-files "gcc/config"
"^gnu-user.*\\.h$")
(("#define GNU_USER_TARGET_LIB_SPEC (.*)$" _ suffix)
;; Note that with this "lib" spec, we may still add a
;; RUNPATH to GCC even when `libgcc_s' is not NEEDED.
;; There's not much that can be done to avoid it, though.
;; Help libgcc_s.so be found (see also below.) Always use
;; '-lgcc_s' so that libgcc_s.so is always found by those
;; programs that use 'pthread_cancel' (glibc dlopens
;; libgcc_s.so when pthread_cancel support is needed, but
;; having it in the application's RUNPATH isn't enough; see
;; <http://sourceware.org/ml/libc-help/2013-11/msg00023.html>.)
(format #f "#define GNU_USER_TARGET_LIB_SPEC \
\"-L~a/lib %{!static:-rpath=~a/lib %{!static-libgcc:-rpath=~a/lib64 -rpath=~a/lib}} \" ~a"
\"-L~a/lib %{!static:-rpath=~a/lib %{!static-libgcc:-rpath=~a/lib64 -rpath=~a/lib -lgcc_s}} \" ~a"
libc libc out out suffix))
(("#define GNU_USER_TARGET_STARTFILE_SPEC.*$" line)
(format #f "#define STANDARD_STARTFILE_PREFIX_1 \"~a/lib\"
@ -173,18 +176,6 @@ (define-public gcc-4.7
~a"
libc line))))
;; Use '-lgcc_s' rather than '--as-needed -lgcc_s', so that
;; libgcc_s.so is always found by those programs that use
;; 'pthread_cancel' (glibc dlopens libgcc_s.so when
;; pthread_cancel support is needed, but having it in the
;; application's RUNPATH isn't enough; see
;; <http://sourceware.org/ml/libc-help/2013-11/msg00023.html>.)
;; Also, "gcc_cv_ld_as_needed=no" as a configure flag doesn't
;; work.
(substitute* "gcc/gcc.c"
(("#ifndef USE_LD_AS_NEEDED.*$" line)
(string-append "#undef USE_LD_AS_NEEDED\n" line)))
;; Don't retain a dependency on the build-time sed.
(substitute* "fixincludes/fixincl.x"
(("static char const sed_cmd_z\\[\\] =.*;")