Do not embed a library fullpath if it is given by -l

filepath.cc

@@ -19,7 +19,7 @@ std::string path_dirname(std::string_view path) {
 // Returns the filename part of a given path.
 // Returns '/' if path reperesents the root directory.
 // Returns '.' if path is empty.
-std::string path_filename(std::string_view path) {
+std::string_view path_filename(std::string_view path) {
   if (path.empty())
     return ".";
 
@@ -31,14 +31,14 @@ std::string path_filename(std::string_view path) {
 
   i64 pos = path.find_last_of('/');
   if (pos == path.npos)
-    return std::string(path);
-  return std::string(path.substr(pos + 1));
+    return path;
+  return path.substr(pos + 1);
 }
 
 // Returns the filename part of a given path without the file
 // extension.
-std::string path_basename(std::string_view path) {
-  std::string name = path_filename(path);
+std::string_view path_basename(std::string_view path) {
+  std::string_view name = path_filename(path);
 
   i64 pos = name.find_last_of('.');
   if (pos == name.npos)

main.cc

@@ -264,6 +264,7 @@ static void read_input_files(Context<E> &ctx, std::span<std::string_view> args)
       state.pop_back();
     } else if (read_arg(ctx, args, arg, "l")) {
       MemoryMappedFile<E> *mb = find_library(ctx, std::string(arg));
+      mb->given_fullpath = false;
       read_file(ctx, mb);
     } else {
       read_file(ctx, MemoryMappedFile<E>::must_open(ctx, std::string(args[0])));

mold.h

@@ -883,6 +883,7 @@ public:
 
   std::string name;
   i64 mtime = 0;
+  bool given_fullpath = true;
 
 private:
   MemoryMappedFile(std::string name, u8 *data, u64 size, u64 mtime = 0)
@@ -1097,8 +1098,8 @@ protected:
 // These are various utility functions to deal with file pathnames.
 std::string get_current_dir();
 std::string path_dirname(std::string_view path);
-std::string path_filename(std::string_view path);
-std::string path_basename(std::string_view path);
+std::string_view path_filename(std::string_view path);
+std::string_view path_basename(std::string_view path);
 std::string path_to_absolute(std::string_view path);
 std::string path_clean(std::string_view path);
 

object_file.cc

@@ -1287,7 +1287,9 @@ std::string_view SharedFile<E>::get_soname(Context<E> &ctx) {
     for (ElfDyn<E> &dyn : this->template get_data<ElfDyn<E>>(ctx, *sec))
       if (dyn.d_tag == DT_SONAME)
         return symbol_strtab.data() + dyn.d_val;
-  return this->name;
+  if (this->mb->given_fullpath)
+    return this->name;
+  return path_filename(this->name);
 }
 
 template <typename E>

test/dt_needed.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -e
+cd $(dirname $0)
+echo -n "Testing $(basename -s .sh $0) ... "
+t=$(pwd)/tmp/$(basename -s .sh $0)
+mkdir -p $t
+
+cat <<EOF | clang -c -o $t/a.o -xc -
+void foo() {}
+EOF
+
+clang -fuse-ld=`pwd`/../mold -shared -o $t/libfoo.so $t/a.o -Wl,--soname,libfoo
+clang -fuse-ld=`pwd`/../mold -shared -o $t/libbar.so $t/a.o
+
+cat <<EOF | clang -c -o $t/b.o -xc -
+int main() {}
+EOF
+
+clang -fuse-ld=`pwd`/../mold -o $t/exe $t/b.o $t/libfoo.so
+readelf --dynamic $t/exe | fgrep -q 'Shared library: [libfoo]'
+
+clang -fuse-ld=`pwd`/../mold -o $t/exe $t/b.o -L $t -lfoo
+readelf --dynamic $t/exe | fgrep -q 'Shared library: [libfoo]'
+
+clang -fuse-ld=`pwd`/../mold -o $t/exe $t/b.o $t/libbar.so
+readelf --dynamic $t/exe | grep -Pq 'Shared library: \[.*dt_needed/libbar\.so\]'
+
+clang -fuse-ld=`pwd`/../mold -o $t/exe $t/b.o -L$t -lbar
+readelf --dynamic $t/exe | fgrep -q 'Shared library: [libbar.so]'
+
+echo OK

test/incompatible-libs.sh

@@ -35,7 +35,7 @@ mkdir -p $t/script
 echo 'OUTPUT_FORMAT(elf32-i386)' > $t/script/libfoo.so
 
 clang -fuse-ld=`pwd`/../mold -o $t/exe -L$t/script -L$t/lib32 -L$t/lib64 \
-  $t/e.o -lfoo >& $t/log
+  $t/e.o -lfoo -rpath $t/lib64 >& $t/log
 
 grep -q 'script/libfoo.so: skipping incompatible file' $t/log
 grep -q 'lib32/libfoo.so: skipping incompatible file' $t/log

test/soname.sh

@@ -6,13 +6,10 @@ t=$(pwd)/tmp/$(basename -s .sh $0)
 mkdir -p $t
 
 cat <<EOF | clang -fPIC -c -o $t/a.o -xc -
-int foo() {
-  return 3;
-}
+void foo() {}
 EOF
 
 clang -fuse-ld=`pwd`/../mold -o $t/b.so -shared $t/a.o -Wl,-soname,foo
-readelf --dynamic $t/b.so > $t/log
-fgrep -q 'Library soname: [foo]' $t/log
+readelf --dynamic $t/b.so | fgrep -q 'Library soname: [foo]'
 
 echo OK