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gnu: gcc-mesboot1: Backport c++ builtin values.

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* gnu/packages/commencement.scm (gcc-mesboot1)[arguments]: Add a custom
phase backporting the correct definitions for __cplusplus.

Change-Id: Ia594fd8ae983c7cfe025fd606f66261e03574f7f
This commit is contained in:
Efraim Flashner 2024-12-17 09:21:08 +02:00
parent 5ad9215858
commit a959866a4b
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GPG key ID: 41AAE7DCCA3D8351
1 changed files with 15 additions and 0 deletions
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15
gnu/packages/commencement.scm
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@ -1957,6 +1957,21 @@ ac_cv_c_float_format='IEEE (little-endian)'
#$configure-flags))))
((#:phases phases)
#~(modify-phases #$phases
(add-after 'unpack 'adjust-builtin-cplusplus-variable
(lambda _
;; These values are backported from later releases of GCC.
;; See gcc commit 1fb80b0c5359f696aa61d537e25b7901d8b56ff7.
;; See gcc commit 97e3ad20b12a5a317d98085df6f18a87f681f377
;; if we need to recognize other flags.
(substitute* "libcpp/init.c"
(("_cpp_define_builtin \\(pfile, \"__cplusplus 1\"\\);")
(string-append "{
if (CPP_OPTION (pfile, lang) == CLK_CXX0X
|| CPP_OPTION (pfile, lang) == CLK_GNUCXX0X)
_cpp_define_builtin (pfile, \"__cplusplus 201103L\");
else
_cpp_define_builtin (pfile, \"__cplusplus 199711L\");
}")))))
(add-before 'configure 'set-cplus-include-path
(lambda _
;; Set the C++ search path so that C headers can be found as