On Sun, Dec 15, 2024 at 10:22:06AM +0200, Mickaël Bucas wrote:

Le sam. 14 déc. 2024, 00:32, Andreas Sturmlechner <asturm@gentoo.org> a écrit :

Every once in a while, a package requires a really up to date active compiler
in order to build successfully. ecm.eclass had inherited such a mechanism, albeit GCC specific, from older kde* eclasses. I don't think that is a good place for it so I suggest to add a more universal function to toolchain-funcs.eclass.

Similar to tc-check-openmp.

Hi

I was wondering: how is this check different from a version dependency in
any *DEPEND variable?

Different compilers and multiple versions of them can be installed at
same time, and the user can pick them by setting e.g. CC=clang-18,
using gcc-config/eselect, PATH, and such.

A dependency check would only ensure that the compiler is installed,
not that it's the one that's being used, what version of it, or even
what USE is enabled for the used slot/compiler (openmp case). This
would only work if the ebuild is enforcing a specific compiler while
ignoring the user's choice.
--
ionen

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Andreas Sturmlechner <asturm@gentoo.org> writes:

Every once in a while, a package requires a really up to date active compiler in order to build successfully. ecm.eclass had inherited such a mechanism, albeit GCC specific, from older kde* eclasses. I don't think that is a good place for it so I suggest to add a more universal function to toolchain-funcs.eclass.

Similar to tc-check-openmp.

LGTM, but please CC eclass maints in future.

eclass/toolchain-funcs.eclass | 44 +++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)

diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass index 2911ed66e63c..cd3dcf000db7 100644
--- a/eclass/toolchain-funcs.eclass
+++ b/eclass/toolchain-funcs.eclass
@@ -647,6 +647,50 @@ _tc-has-openmp() {
return ${ret}
}

+# @FUNCTION: tc-check-min_ver
+# @USAGE: <gcc or clang> <minimum version>
+# @DESCRIPTION:
+# Minimum version of active GCC or Clang to require.
+#
+# You should test for any necessary minimum version in pkg_pretend in order to
+# warn the user of required toolchain changes. You must still check for it at
+# build-time, e.g.
+# @CODE
+# pkg_pretend() {
+# [[ ${MERGE_TYPE} != binary ]] && tc-check-min_ver gcc 13.2.0
+# }
+#
+# pkg_setup() {
+# [[ ${MERGE_TYPE} != binary ]] && tc-check-min_ver gcc 13.2.0
+# }
+# @CODE
+tc-check-min_ver() {
+ do_check() {
+ debug-print "Compiler version check for ${1}"
+ debug-print "Detected: ${2}"
+ debug-print "Required: ${3}"
+ if ver_test ${2} -lt ${3}; then
+ eerror "Your current compiler is too old for this package!"
+ die "Active compiler is too old for this package (found ${2})."
+ fi
+ }
+
+ case ${1} in
+ gcc)
+ tc-is-gcc || return
+ do_check GCC $(gcc-version) ${2}
+ ;;
+ clang)
+ tc-is-clang || return
+ do_check Clang $(clang-version) ${2}
+ ;;
+ *)
+ eerror "Unknown first parameter for ${FUNCNAME} - must be gcc or clang"
+ die "${FUNCNAME}: Parameter ${1} unknown"
+ ;;
+ esac
+}
+
# @FUNCTION: tc-check-openmp
# @DESCRIPTION:
# Test for OpenMP support with the current compiler and error out with

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