commit:     d7318bdc9ad2d2991baa0a5a3037dd0e1ca9fcf9
Author:     Sv. Lockal <lockalsash <AT> gmail <DOT> com>
AuthorDate: Sat Jan 10 16:23:21 2026 +0000
Commit:     Sam James <sam <AT> gentoo <DOT> org>
CommitDate: Sun Jan 11 09:16:58 2026 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d7318bdc

cmake.eclass: fix removal of FindBLAS.cmake during cmake-4.2.1 upgrade

Change done in 3f8ff6b53f4c9d048cb677b0e41a4f5089951d5d had a logic
mistake. Original logic was: if CMAKE_REMOVE_MODULES_LIST is not empty,
then validate that it is array. Otherwise (emty string or unset), set
it to remove FindBLAS.cmake and FindLAPACK.cmake. After change
if effectively always set any non-empty CMAKE_REMOVE_MODULES_LIST array
to ( FindBLAS FindLAPACK ), if <dev-build/cmake-4.2.1 is installed.
In the result, upgrade from cmake-4.1.2 to cmake-4.2.1 resulted in
removed FindBLAS.cmake and FindLAPACK.cmake.

What should be done instead is just checking that
CMAKE_REMOVE_MODULES_LIST is not an array.
1) Explicitly empty array - no need to remove FindBLAS/FindLAPACK
2) Unset and <dev-build/cmake-4.2.1 - remove them.

This change is followed by cmake-4.2.1 revbump, because existing
upgraded installations may lack FindBLAS.cmake and FindLAPACK.cmake.

Bug: https://bugs.gentoo.org/968511
Signed-off-by: Sv. Lockal <lockalsash <AT> gmail.com>
Part-of: https://github.com/gentoo/gentoo/pull/45321
Signed-off-by: Sam James <sam <AT> gentoo.org>

 eclass/cmake.eclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/eclass/cmake.eclass b/eclass/cmake.eclass
index 03c54866f2e8..643370f53536 100644
--- a/eclass/cmake.eclass
+++ b/eclass/cmake.eclass
@@ -493,7 +493,7 @@ cmake_prepare() {
                die "FATAL: Unable to find CMakeLists.txt"
        fi
 
-       if ! [[ ${CMAKE_REMOVE_MODULES_LIST@a} == *a* && 
${#CMAKE_REMOVE_MODULES_LIST[@]} -eq 0 ]]; then
+       if [[ ${CMAKE_REMOVE_MODULES_LIST@a} != *a* ]]; then
                if has_version -b "<dev-build/cmake-4.2.1"; then
                        CMAKE_REMOVE_MODULES_LIST=( FindBLAS FindLAPACK )
                fi

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