From c35cde1edbe9d3375ed880fe8bb7d0fffba2f000 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Mon, 18 Feb 2002 08:45:53 +0000
Subject: Make shared libs properly list the correct ld.so in the interp field
 by being sneaky.

---
 ldso/libdl/Makefile          |  3 ++-
 libc/Makefile                |  3 ++-
 libc/misc/internals/Makefile | 15 ++++++++++++---
 libcrypt/Makefile            |  3 ++-
 libm/Makefile                |  5 +++--
 libresolv/Makefile           |  3 ++-
 libutil/Makefile             |  3 ++-
 7 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/ldso/libdl/Makefile b/ldso/libdl/Makefile
index deb9a7f12..0e8d0a039 100644
--- a/ldso/libdl/Makefile
+++ b/ldso/libdl/Makefile
@@ -52,7 +52,8 @@ $(OBJ): Makefile
 shared:
 	$(LD) $(LDFLAGS) -soname=$(LIBDL_SHARED).$(MAJOR_VERSION) \
 		-o $(LIBDL_SHARED_FULLNAME) --whole-archive $(LIBDL) \
-		--no-whole-archive -L$(TOPDIR)/lib -lc;
+		--no-whole-archive $(TOPDIR)/libc/misc/internals/interp.o \
+		-L$(TOPDIR)/lib -lc;
 	install -d $(TOPDIR)lib
 	rm -f $(TOPDIR)lib/$(LIBDL_SHARED_FULLNAME) $(TOPDIR)lib/$(LIBDL_SHARED).$(MAJOR_VERSION)
 	install -m 644 $(LIBDL_SHARED_FULLNAME) $(TOPDIR)lib;
diff --git a/libc/Makefile b/libc/Makefile
index 0d5d758eb..a393b6d9f 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -47,7 +47,8 @@ shared: $(TOPDIR)lib/$(LIBNAME)
 	@(cd tmp && CC=$(CC) LD=$(LD) NM=$(NM) AR=$(AR) \
 		/bin/sh ../../extra/scripts/get-needed-libgcc-objects.sh)
 	$(LD) $(LDFLAGS) -soname=$(SHARED_MAJORNAME) -o $(SHARED_FULLNAME) \
-		--whole-archive ./tmp/libgcc-need.a $(LIBNAME) --no-whole-archive $(LDSO)
+		--whole-archive ./tmp/libgcc-need.a $(LIBNAME) --no-whole-archive \
+		$(TOPDIR)/libc/misc/internals/interp.o
 	@/bin/true #rm -rf tmp
 	install -d $(TOPDIR)lib
 	rm -f $(TOPDIR)lib/$(SHARED_FULLNAME)
diff --git a/libc/misc/internals/Makefile b/libc/misc/internals/Makefile
index 8e4d160a9..29ffdec7b 100644
--- a/libc/misc/internals/Makefile
+++ b/libc/misc/internals/Makefile
@@ -35,17 +35,26 @@ endif
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 OBJS=$(COBJS)
 
-all: $(OBJS) $(LIBC)
+all: $(OBJS) interp.o $(LIBC)
 
-$(LIBC): ar-target
+$(LIBC): interp.c ar-target
 
 ar-target: $(OBJS)
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
 
+interp.c: Makefile
+	echo "/* Force shared libraries to know about the correct library loader */" > interp.c
+	echo "const char __dl_ldso__[] __attribute__ ((section " \
+		"(\".interp\"))) =\""$(DYNAMIC_LINKER)"\";" >> interp.c
+
 $(COBJS): %.o : %.c
 	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
+interp.o: %.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
 clean:
-	rm -f *.[oa] *~ core
+	rm -f *.[oa] interp.c *~ core
 
diff --git a/libcrypt/Makefile b/libcrypt/Makefile
index 73bebd9db..cc623fa5e 100644
--- a/libcrypt/Makefile
+++ b/libcrypt/Makefile
@@ -50,7 +50,8 @@ $(OBJ): Makefile
 shared: all
 	$(LD) $(LDFLAGS) -soname=$(LIBCRYPT_SHARED).$(MAJOR_VERSION) \
 		-o $(LIBCRYPT_SHARED_FULLNAME) --whole-archive $(LIBCRYPT) \
-		--no-whole-archive -L$(TOPDIR)/lib -lc;
+		--no-whole-archive $(TOPDIR)/libc/misc/internals/interp.o \
+		-L$(TOPDIR)/lib -lc;
 	install -d $(TOPDIR)lib
 	rm -f $(TOPDIR)lib/$(LIBCRYPT_SHARED_FULLNAME) $(TOPDIR)lib/$(LIBCRYPT_SHARED).$(MAJOR_VERSION)
 	install -m 644 $(LIBCRYPT_SHARED_FULLNAME) $(TOPDIR)lib;
diff --git a/libm/Makefile b/libm/Makefile
index 3cd82d686..e9cdf47df 100644
--- a/libm/Makefile
+++ b/libm/Makefile
@@ -94,8 +94,9 @@ shared: all
 	@if [ -f $(LIBM) ] ; then \
 	    set -x -e; \
 	    $(LD) $(LDFLAGS) -soname=$(LIBM_SHARED).$(MAJOR_VERSION) \
-		    -o $(LIBM_SHARED_FULLNAME) --whole-archive $(LIBM) \
-		    --no-whole-archive -L$(TOPDIR)/lib -lc; \
+		-o $(LIBM_SHARED_FULLNAME) --whole-archive $(LIBM) \
+		--no-whole-archive $(TOPDIR)/libc/misc/internals/interp.o \
+		-L$(TOPDIR)/lib -lc; \
 	    install -d $(TOPDIR)lib; \
 	    rm -f $(TOPDIR)lib/$(LIBM_SHARED_FULLNAME) $(TOPDIR)lib/$(LIBM_SHARED).$(MAJOR_VERSION); \
 	    install -m 644 $(LIBM_SHARED_FULLNAME) $(TOPDIR)lib; \
diff --git a/libresolv/Makefile b/libresolv/Makefile
index 1da125a62..57c915f4e 100644
--- a/libresolv/Makefile
+++ b/libresolv/Makefile
@@ -51,7 +51,8 @@ $(OBJ): Makefile
 shared: all
 	$(LD) $(LDFLAGS) -soname=$(LIBRESOLV_SHARED).$(MAJOR_VERSION) \
 		-o $(LIBRESOLV_SHARED_FULLNAME) --whole-archive $(LIBRESOLV) \
-		--no-whole-archive -L$(TOPDIR)/lib -lc;
+		--no-whole-archive $(TOPDIR)/libc/misc/internals/interp.o \
+		-L$(TOPDIR)/lib -lc;
 	install -d $(TOPDIR)lib
 	rm -f $(TOPDIR)lib/$(LIBRESOLV_SHARED_FULLNAME) $(TOPDIR)lib/$(LIBRESOLV_SHARED).$(MAJOR_VERSION)
 	install -m 644 $(LIBRESOLV_SHARED_FULLNAME) $(TOPDIR)lib;
diff --git a/libutil/Makefile b/libutil/Makefile
index 7ed8239e2..919772ec1 100644
--- a/libutil/Makefile
+++ b/libutil/Makefile
@@ -52,7 +52,8 @@ $(OBJS): %.o : %.c
 shared: all
 	$(LD) $(LDFLAGS) -soname=$(LIBUTIL_SHARED).$(MAJOR_VERSION) \
 		-o $(LIBUTIL_SHARED_FULLNAME) --whole-archive $(LIBUTIL) \
-		--no-whole-archive -L$(TOPDIR)/lib -lc;
+		--no-whole-archive $(TOPDIR)/libc/misc/internals/interp.o \
+		-L$(TOPDIR)/lib -lc;
 	install -d $(TOPDIR)lib
 	rm -f $(TOPDIR)lib/$(LIBUTIL_SHARED_FULLNAME) $(TOPDIR)lib/$(LIBUTIL_SHARED).$(MAJOR_VERSION)
 	install -m 644 $(LIBUTIL_SHARED_FULLNAME) $(TOPDIR)lib/;
-- 
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