[openwrt/openwrt] tools: gnulib: fix broken install of .m4 files

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/78a8cfb57772138ff5b925b9d69928e5878931bf

commit 78a8cfb57772138ff5b925b9d69928e5878931bf
Author: Christian Marangi <ansuelsmth at gmail.com>
AuthorDate: Thu Dec 4 16:32:03 2025 +0100

    tools: gnulib: fix broken install of .m4 files
    
    Makefile foreach works only on parsing the Makefile and in this specific
    case only works if the package is already extracted and file actually
    exist.
    
    On scenario where the package still has to be built, foreach doesn't
    find any file causing Host/Install to not install any .m4 file.
    
    To handle this, use a shell for loop that scan files in the
    Host/install.
    
    Fixes: c820f097e0be ("tools: gnulib: install .m4 file with gl_ prefix")
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 tools/gnulib/Makefile | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/gnulib/Makefile b/tools/gnulib/Makefile
index 018ff5db14..0b28d73d13 100644
--- a/tools/gnulib/Makefile
+++ b/tools/gnulib/Makefile
@@ -20,8 +20,10 @@ endef
 define Host/Install
 	$(call Host/Uninstall)
 	$(INSTALL_DIR) $(1)/share/aclocal
-	$(foreach m4,$(notdir $(wildcard $(HOST_BUILD_DIR)/m4/*.m4)),
-		$(INSTALL_DATA) $(HOST_BUILD_DIR)/m4/$(m4) $(1)/share/aclocal/gl_$(m4))
+	for m4 in $(HOST_BUILD_DIR)/m4/*.m4; do \
+		$(INSTALL_DATA) $(HOST_BUILD_DIR)/m4/$$$$(basename $$$$m4) \
+				$(1)/share/aclocal/gl_$$$$(basename $$$$m4); \
+	done
 	$(CP) $(HOST_BUILD_DIR)/ $(1)/share/gnulib/
 	ln -sf ../share/gnulib/gnulib-tool $(STAGING_DIR_HOST)/bin/gnulib-tool
 endef