For LoongArch, the toplevel library build is always aliased to one of the multilib variants. This patch installs it with the actual MULTISUBDIR (instead of ".") so that the headers can be reached by the compiler.
This patch is an update of https://gcc.gnu.org/pipermail/gcc-patches/2023-September/629435.html libstdc++-v3/ChangeLog: * configure.host: Register t-loongarch in tmake_file. * config/cpu/loongarch/t-loongarch: New file. Manually refresh MULTISUBDIR with $(shell $(CXX) --print-multi-directory). --- libstdc++-v3/config/cpu/loongarch/t-loongarch | 1 + libstdc++-v3/configure.host | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) create mode 100644 libstdc++-v3/config/cpu/loongarch/t-loongarch diff --git a/libstdc++-v3/config/cpu/loongarch/t-loongarch b/libstdc++-v3/config/cpu/loongarch/t-loongarch new file mode 100644 index 00000000000..adfc8ebb93e --- /dev/null +++ b/libstdc++-v3/config/cpu/loongarch/t-loongarch @@ -0,0 +1 @@ +AM_MAKEFLAGS += " MULTISUBDIR=/$(shell $(CXX) --print-multi-directory)" diff --git a/libstdc++-v3/configure.host b/libstdc++-v3/configure.host index 9e7c7f02dfd..9dc42ad3edb 100644 --- a/libstdc++-v3/configure.host +++ b/libstdc++-v3/configure.host @@ -315,7 +315,10 @@ esac # Set any OS-dependent and CPU-dependent bits. # THIS TABLE IS SORTED. KEEP IT THAT WAY. case "${host}" in - *-*-linux* | *-*-uclinux*) + loongarch*) + tmake_file="cpu/loongarch/t-loongarch" + ;; + *-*-linux* | *-*-uclinux*) case "${host_cpu}" in i[567]86) abi_baseline_pair=i486-linux-gnu -- 2.36.0