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authorLudovic Courtès <ludo@gnu.org>2020-07-24 09:56:25 +0200
committerLudovic Courtès <ludo@gnu.org>2020-07-24 14:21:30 +0200
commit12dc9f58c422c06bf9950f21c54ca3df1dc40af1 (patch)
tree7c2a394e2f1e7cc4fb5691c678ba397bc3e30783 /gnu/packages/gcc.scm
parentb1d3c122e1712cf390a24b600415b87df2d3bfdc (diff)
gnu: gcc: Fix libstdc++ misconfiguration.
Fixes <https://bugs.gnu.org/42392>. Reported by Maxim Cournoyer and Erik Garrison. Until now, the generated <bits/c++config.h> would be incorrect (many _GLIBCXX_HAVE macros would be undefined), which in turn would lead to build failures for most C++ programs. * gnu/packages/gcc.scm (gcc-6)[inputs]: Add LIBSTDC++-HEADERS. (libstdc++, libstdc++-headers): New variables. * gnu/packages/gcc.scm (gfortran): Change first argument to 'custom-gcc' to remove dependency on LIBSTDC++-HEADERS.
Diffstat (limited to 'gnu/packages/gcc.scm')
-rw-r--r--gnu/packages/gcc.scm39
1 files changed, 38 insertions, 1 deletions
diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index e0e236192f..a39ac3b84c 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -514,6 +514,12 @@ Go. It also includes runtime support libraries for these languages.")
(inputs
`(("isl" ,isl)
+
+ ;; XXX: This gross hack allows us to have libstdc++'s <bits/c++config.h>
+ ;; in the search path, thereby avoiding misconfiguration of libstdc++:
+ ;; <https://bugs.gnu.org/42392>.
+ ("libstdc++" ,libstdc++-headers)
+
,@(package-inputs gcc-4.7)))))
(define-public gcc-7
@@ -607,6 +613,31 @@ using compilers other than GCC."
(propagated-inputs '())
(synopsis "GNU C++ standard library")))
+(define libstdc++
+ ;; Libstdc++ matching the default GCC.
+ (make-libstdc++ gcc))
+
+(define libstdc++-headers
+ ;; XXX: This package is for internal use to work around
+ ;; <https://bugs.gnu.org/42392> (see above). The main difference compared
+ ;; to the libstdc++ headers that come with 'gcc' is that <bits/c++config.h>
+ ;; is right under include/c++ and not under
+ ;; include/c++/x86_64-unknown-linux-gnu (aka. GPLUSPLUS_TOOL_INCLUDE_DIR).
+ (package
+ (inherit libstdc++)
+ (name "libstdc++-headers")
+ (outputs '("out"))
+ (build-system trivial-build-system)
+ (arguments
+ '(#:builder (let* ((out (assoc-ref %outputs "out"))
+ (libstdc++ (assoc-ref %build-inputs "libstdc++")))
+ (mkdir out)
+ (mkdir (string-append out "/include"))
+ (symlink (string-append libstdc++ "/include")
+ (string-append out "/include/c++")))))
+ (inputs `(("libstdc++" ,libstdc++)))
+ (synopsis "Headers of GNU libstdc++")))
+
(define-public libstdc++-4.9
(make-libstdc++ gcc-4.9))
@@ -689,7 +720,13 @@ as the 'native-search-paths' field."
(define-public gfortran
(hidden-package
- (custom-gcc gcc "gfortran" '("fortran")
+ (custom-gcc (package
+ (inherit gcc)
+ ;; XXX: Remove LIBSTDC++-HEADERS from the inputs just to
+ ;; avoid a rebuild of all the GFORTRAN dependents.
+ ;; TODO: Remove this hack on the next rebuild cycle.
+ (inputs (alist-delete "libstdc++" (package-inputs gcc))))
+ "gfortran" '("fortran")
%generic-search-paths)))
(define-public gdc-10