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-rw-r--r--elf/Makefile13
1 files changed, 13 insertions, 0 deletions
diff --git a/elf/Makefile b/elf/Makefile
index 8f98cb8..87f2d0d 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -41,6 +41,8 @@ extra-libs = libdl
extra-libs-others = $(extra-libs)
libdl-routines := dlopen dlclose dlsym dlerror dladdr
+before-compile = $(objpfx)trusted-dirs.h
+
all: # Make this the default target; it will be defined in Rules.
@@ -92,6 +94,17 @@ $(objpfx)$(rtld-installed-name): $(objpfx)ld.so
ln -s $(<F) $@
endif
+# Build a file mentioning all trustworthy directories to look for shared
+# libraries when using LD_LIBRARY_PATH in a setuid program. The user can
+# add directories to the list by defining $(user-defined-trusted-dirs)
+# before starting make.
+$(objpfx)trusted-dirs.h: Makefile
+ (for dir in `echo "$(default-rpath) $(user-defined-trusted-dirs)" | \
+ sed 's/:/ /g'`; do \
+ echo " \"$$dir\","; \
+ done;) > $@T
+ mv -f $@T $@
+CFLAGS-dl-load.c = -I$(objdir)/$(subdir)
# Specify the dependencies of libdl.so; its commands come from the generic
# rule to build a shared library.