[gentoo-commits] repo/gentoo:master commit in: eclass/tests/, eclass/

[Michał Górny]

commit:     96ddadb40ddba1bfdba68ff8f2fd889cfd004f03
Author:     Michał Górny <mgorny <AT> gentoo <DOT> org>
AuthorDate: Fri Oct  7 15:22:01 2022 +0000
Commit:     Michał Górny <mgorny <AT> gentoo <DOT> org>
CommitDate: Mon Oct 10 20:52:35 2022 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=96ddadb4

toolchain-funcs.eclass: Add tc-get-c-rtlib() to get CC runtime

Add a new tc-get-c-rtlib() that attempts to get the runtime used
by the current C compiler.  Currently it supports compiler-rt
and libgcc.

Signed-off-by: Michał Górny <mgorny <AT> gentoo.org>

 eclass/tests/toolchain-funcs.sh | 10 ++++++++++
 eclass/toolchain-funcs.eclass   | 28 ++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/eclass/tests/toolchain-funcs.sh b/eclass/tests/toolchain-funcs.sh
index 5a35a44ce018..d8a357fb24fe 100755
--- a/eclass/tests/toolchain-funcs.sh
+++ b/eclass/tests/toolchain-funcs.sh
@@ -202,6 +202,10 @@ if type -P gcc &>/dev/null; then
        tbegin "tc-get-cxx-stdlib (gcc)"
        [[ $(CXX=g++ tc-get-cxx-stdlib) == libstdc++ ]]
        tend $?
+
+       tbegin "tc-get-c-rtlib (gcc)"
+       [[ $(CC=gcc tc-get-c-rtlib) == libgcc ]]
+       tend $?
 fi
 
 if type -P clang &>/dev/null; then
@@ -218,6 +222,12 @@ if type -P clang &>/dev/null; then
        tbegin "tc-get-cxx-stdlib (clang, invalid)"
        ! CXX=clang++ CXXFLAGS="-stdlib=invalid" tc-get-cxx-stdlib
        tend $?
+
+       for rtlib in compiler-rt libgcc; do
+               tbegin "tc-get-c-rtlib (clang, ${rtlib})"
+               [[ $(CC=clang CFLAGS="--rtlib=${rtlib}" tc-get-c-rtlib) == 
${rtlib} ]]
+               tend $?
+       done
 fi
 
 texit

diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass
index 92494158201e..32e446cb2368 100644
--- a/eclass/toolchain-funcs.eclass
+++ b/eclass/toolchain-funcs.eclass
@@ -1209,4 +1209,32 @@ tc-get-cxx-stdlib() {
        return 0
 }
 
+# @FUNCTION: tc-get-c-rtlib
+# @DESCRIPTION:
+# Attempt to identify the runtime used by the C/C++ compiler.
+# If the runtime is identifed, the function returns 0 and prints one
+# of the following:
+#
+# - ``compiler-rt`` for ``sys-libs/compiler-rt``
+# - ``libgcc`` for ``sys-devel/gcc``'s libgcc
+#
+# If the runtime is not recognized, the function returns 1.
+tc-get-c-rtlib() {
+       local res=$(
+               $(tc-getCC) ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} \
+                       -print-libgcc-file-name 2>/dev/null
+       )
+
+       case ${res} in
+               *libclang_rt*)
+                       echo compiler-rt;;
+               *libgcc*)
+                       echo libgcc;;
+               *)
+                       return 1;;
+       esac
+
+       return 0
+}
+
 fi