gnu: Use GCC 7 as the default compiler.

* gnu/packages/cross-base.scm (%gcc-cross-include-paths): Remove
CROSS_C_INCLUDE_PATH & co in favor of CROSS_CPATH.
* gnu/build/cross-toolchain.scm (%gcc-cross-include-paths): Likewise.
(cross-gcc-build-phases): Set CROSS_C_INCLUDE_PATH and
CROSS_CPLUS_INCLUDE_PATH when building the cross GCC.
* gnu/packages/commencement.scm (libstdc++): Add
"--disable-libstdcxx-dual-abi" to #:configure-flags.
(gcc-boot0)[arguments]: Add "--disable-libmpx"
to #:configure-flags.
(gcc-final): Add phase to set C_INCLUDE_PATH and CPLUS_INCLUDE_PATH before
building GCC.
(gcc-toolchain-5): Use MAKE-GCC-TOOLCHAIN.
(gcc-toolchain-7): Change to GCC-TOOLCHAIN.
* gnu/packages/gcc.scm (gcc): Change from GCC-5 to GCC-7.
(gfortran): Change to GFORTRAN-7.
(gcc-objc): Change to GCC-OBJC-7.
(gcc-objc++): Change to GCC-OBJC++-7.
* gnu/packages/rust.scm (rust-1.19.0)[native-search-paths]: Change from
C_INCLUDE_PATH & co to CPATH.

1 files changed, 4 insertions, 4 deletions

diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index 1f1e80dde8..3b6c540221 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -522,7 +522,7 @@ It also includes runtime support libraries for these languages.")))
 ;; Note: When changing the default gcc version, update
 ;;       the gcc-toolchain-* definitions and the gfortran definition
 ;;       accordingly.
-(define-public gcc gcc-5)
+(define-public gcc gcc-7)
 
 (define-public (make-libstdc++ gcc)
   "Return a libstdc++ package based on GCC.  The primary use case is when
@@ -660,7 +660,7 @@ as the 'native-search-paths' field."
   ;; (custom-gcc gcc "fortran" …) because that would lead to a package object
   ;; that is not 'eq?' with GFORTRAN-5, and thus 'fold-packages' would
   ;; report two gfortran@5 that are in fact identical.
-  gfortran-5)
+  gfortran-7)
 
 (define-public gccgo-4.9
   (custom-gcc gcc-4.9 "gccgo" '("go")
@@ -724,7 +724,7 @@ as the 'native-search-paths' field."
                      (variable "LIBRARY_PATH")
                      (files '("lib" "lib64"))))))
 
-(define-public gcc-objc gcc-objc-5)
+(define-public gcc-objc gcc-objc-7)
 
 (define-public gcc-objc++-4.8
   (custom-gcc gcc-4.8 "gcc-objc++" '("obj-c++")
@@ -780,7 +780,7 @@ as the 'native-search-paths' field."
                      (variable "LIBRARY_PATH")
                      (files '("lib" "lib64"))))))
 
-(define-public gcc-objc++ gcc-objc++-5)
+(define-public gcc-objc++ gcc-objc++-7)
 
 (define (make-libstdc++-doc gcc)
   "Return a package with the libstdc++ documentation for GCC."