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-rw-r--r--Makerules20
1 files changed, 20 insertions, 0 deletions
diff --git a/Makerules b/Makerules
index ad9d74f..372b3c0 100644
--- a/Makerules
+++ b/Makerules
@@ -916,6 +916,26 @@ endef
installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\
$(inst_libdir)/$(patsubst %,$(libtype$o),\
$(libprefix)$(libc-name)))
+
+.PHONY: check-install-supported
+check-install-supported:
+
+# Check to see if the prefix or exec_prefix GNU standard variable
+# has been overridden on the command line and, if so, fail with
+# an error message since doing so is not supported (set DESTDIR
+# instead).
+ifeq ($(origin prefix),command line)
+check-install-supported:
+ $(error Overriding prefix is not supported. Set DESTDIR instead.)
+endif
+
+ifeq ($(origin exec_prefix),command line)
+check-install-supported:
+ $(error Overriding exec_prefix is not supported. Set DESTDIR instead.)
+endif
+
+install: check-install-supported
+
install: $(installed-libcs)
$(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force)
$(make-target-directory)