gnu: Switch to GCC 4.8 as the default compiler.

* build-aux/download.scm (file-name->uri): Update URL to /20131110.
* gnu-system.am (nodist_bootstrap_x86_64_linux_DATA,
  nodist_bootstrap_i686_linux_DATA): Change base name to
  'guile-2.0.9.tar.xz'.
  (gnu/packages/bootstrap/x86_64-linux/guile-2.0.9.tar.xz,
  gnu/packages/bootstrap/i686-linux/guile-2.0.9.tar.xz): New targets.
  (gnu/packages/bootstrap/x86_64-linux/guile-2.0.7.tar.xz,
  gnu/packages/bootstrap/i686-linux/guile-2.0.7.tar.xz): Remove.
  (gnu/packages/bootstrap/mips64el-linux/guile-2.0.9.tar.xz): Update
  hash.
* gnu/packages/base.scm (gcc-boot0): Base upon GCC-4.8.  Enable C++, and
  add a few --disable flags.  Remove MPFR workaround.
  (cross-gcc-wrapper): Base upon GCC-4.8.  Wrap both 'gcc' and 'g++'.
  (libstdc++): New variable.
  (gcc-final): Add it as an input; pass corresponding -I and -L flags.
* gnu/packages/bootstrap.scm (%bootstrap-guile): Always use
  "guile-2.0.9.tar.xz.
  (%bootstrap-coreutils&co): Update hashes.
  (%bootstrap-binutils): Update URL and hashes.
  (%bootstrap-glibc): Likewise.
  (%bootstrap-gcc): Likewise.
* gnu/packages/gcc.scm (gcc-4.7): Add LDFLAGS.
  Add --disable-libstdcxx-pch.
  Modify the GNU_USER*_SPEC macros from gnu-user*.h instead of the raw
  _SPEC macros.

1 files changed, 18 insertions, 7 deletions

diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index bbc0a134d2..db1984306e 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -73,6 +73,9 @@ where the OS part is overloaded to denote a specific ABI---into GCC
                      "--enable-languages=c,c++"
                      "--disable-multilib"
 
+                     ;; No pre-compiled libstdc++ headers, to save space.
+                     "--disable-libstdcxx-pch"
+
                      "--with-local-prefix=/no-gcc-local-prefix"
 
                      ,(let ((libc (assoc-ref %build-inputs "libc")))
@@ -115,7 +118,9 @@ where the OS part is overloaded to denote a specific ABI---into GCC
          #:strip-binaries? ,stripped?
          #:configure-flags ,(configure-flags)
          #:make-flags
-         (let ((libc (assoc-ref %build-inputs "libc")))
+         (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 "
@@ -123,6 +128,12 @@ where the OS part is overloaded to denote a specific ABI---into GCC
                                         "-Wl," libc
                                         ,(glibc-dynamic-linker)))
                    '())
+
+             ;; Native programs like 'genhooks' also need that right.
+             ,(string-append "LDFLAGS="
+                              "-Wl,-rpath=" libc-native "/lib "
+                             "-Wl,-dynamic-linker "
+                             "-Wl," libc-native ,(glibc-dynamic-linker))
              ,(string-append "BOOT_CFLAGS=-O2 "
                              ,(if stripped? "-g0" "-g"))))
 
@@ -148,18 +159,18 @@ where the OS part is overloaded to denote a specific ABI---into GCC
                 ;; Tell where to find libstdc++, libc, and `?crt*.o', except
                 ;; `crt{begin,end}.o', which come with GCC.
                 (substitute* (find-files "gcc/config"
-                                         "^(gnu-user(64)?|linux-elf)\\.h$")
-                  (("#define LIB_SPEC (.*)$" _ suffix)
+                                         "^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.
-                   (format #f "#define LIB_SPEC \"-L~a/lib %{!static:-rpath=~a/lib \
-%{!static-libgcc:-rpath=~a/lib64 -rpath=~a/lib}} \" ~a"
+                   (format #f "#define GNU_USER_TARGET_LIB_SPEC \
+\"-L~a/lib %{!static:-rpath=~a/lib %{!static-libgcc:-rpath=~a/lib64 -rpath=~a/lib}} \" ~a"
                            libc libc out out suffix))
-                  (("#define STARTFILE_SPEC.*$" line)
+                  (("#define GNU_USER_TARGET_STARTFILE_SPEC.*$" line)
                    (format #f "#define STANDARD_STARTFILE_PREFIX_1 \"~a/lib\"
 #define STANDARD_STARTFILE_PREFIX_2 \"\"
-~a~%"
+~a"
                            libc line))))
 
               ;; Don't retain a dependency on the build-time sed.