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build-system: cmake: Use a toolchain file for cross compiling.

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* guix/build-system/cmake.scm (make-toolchain-alist): New procedure.
(make-cmake-toolchain): New procedure.

(cmake-cross-build): Replace cross configure-flags with CMAKE_TOOLCHAIN_FILE

Change-Id: Id754f5d7612b03aca18e1238c12a2b6b13f64381
Signed-off-by: Greg Hogan <code@greghogan.com>
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Dariqq 2025-08-09 10:06:22 +00:00 • committed by Greg Hogan
parent 3cd05936ea
commit 7e5b447d72
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1 changed files with 27 additions and 6 deletions
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33
guix/build-system/cmake.scm
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@ -70,6 +70,28 @@
((? target-avr?) "avr")
(_ (car (string-split target #\-)))))
(define* (make-toolchain-alist target)
`((CMAKE_SYSTEM_NAME . ,(cmake-system-name-for-target target))
(CMAKE_SYSTEM_PROCESSOR . ,(cmake-system-processor-for-target target))
(CMAKE_C_COMPILER . ,(cc-for-target target))
(CMAKE_CXX_COMPILER . ,(cxx-for-target target))
(PKG_CONFIG_EXECUTABLE . ,(pkg-config-for-target target))))
(define (make-cmake-toolchain target)
(computed-file (string-append target "-toolchain.cmake")
#~(begin
(use-modules (ice-9 match))
(call-with-output-file #$output
(lambda (port)
(define (cmake-set-value key value)
(format port "set(~a ~s)~%" key value))
(for-each
(match-lambda
((key . value)
(cmake-set-value key value)))
'#$(make-toolchain-alist target)))))))
(define %cmake-build-system-modules
;; Build-side modules imported by default.
`((guix build cmake-build-system)
@ -252,6 +274,9 @@ provides a 'CMakeLists.txt' file as its build system."
"Cross-build NAME using CMAKE for TARGET, where TARGET is a GNU triplet and
with INPUTS. This assumes that SOURCE provides a 'CMakeLists.txt' file as its
build system."
(define toolchain
(make-cmake-toolchain target))
(define builder
(with-imported-modules imported-modules
#~(begin
@ -283,12 +308,8 @@ build system."
search-path-specification->sexp
native-search-paths)
#:phases #$phases
#:configure-flags `(#$(string-append "-DCMAKE_C_COMPILER="
(cc-for-target target))
#$(string-append "-DCMAKE_CXX_COMPILER="
(cxx-for-target target))
#$(string-append "-DCMAKE_SYSTEM_NAME="
(cmake-system-name-for-target target))
#:configure-flags `(,(string-append "-DCMAKE_TOOLCHAIN_FILE="
#+toolchain)
,@#$(if (pair? configure-flags)
(sexp->gexp configure-flags)
configure-flags))