TCC treats -nostdlib and -Wl,-nostdlib as equivalent, but on other compilers
which call a discrete linker, -nostdlib behaves as on tcc (not adding
startfiles/libc/endfiles) by modifying the ld command line, but -Wl,-nostdlib
adds -nostdlib to the ld cmdline, which stops the linker searching the default
directories for libraries.
---
libtcc.c | 5 +++--
tcc-doc.texi | 11 ++++++++---
tcc.c | 3 ++-
tcc.h | 1 +
4 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/libtcc.c b/libtcc.c
index 1c4b4a55..45133991 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -924,7 +924,8 @@ LIBTCCAPI int tcc_set_output_type(TCCState *s, int
output_type)
return 0;
}
- tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
+ if (!s->nostdlib_paths)
+ tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
#ifdef TCC_TARGET_PE
# ifdef TCC_IS_NATIVE
@@ -1383,7 +1384,7 @@ static int tcc_set_linker(TCCState *s, const char *option)
if (link_option(option, "Bsymbolic", &p)) {
s->symbolic = 1;
} else if (link_option(option, "nostdlib", &p)) {
- s->nostdlib = 1;
+ s->nostdlib_paths = 1;
} else if (link_option(option, "e=", &p)
|| link_option(option, "entry=", &p)) {
copy_linker_arg(&s->elf_entryname, p, 0);
diff --git a/tcc-doc.texi b/tcc-doc.texi
index 47acb528..d9df2d1a 100644
--- a/tcc-doc.texi
+++ b/tcc-doc.texi
@@ -333,9 +333,6 @@ Link your program with dynamic library libxxx.so or static
library
libxxx.a. The library is searched in the paths specified by the
@option{-L} option and @env{LIBRARY_PATH} variable.
-@item -nostdlib
-Don't implicitly link with libc, the C runtime files, and libtcc1.
-
@item -Bdir
Set the path where the tcc internal libraries (and include files) can be
found (default is @file{PREFIX/lib/tcc}).
@@ -357,6 +354,14 @@ opened with @code{dlopen()} needs to access executable
symbols.
@item -r
Generate an object file combining all input files.
+@item -nostdlib
+Don't implicitly link with libc, the C runtime files, and libtcc1.
+
+@item -Wl,-nostdlib
+Don't search the default paths for libraries (@file{/usr/local/lib},
+@file{/usr/lib} and @file{/lib}). Only the paths specified with @option{-L}
+and @env{LIBRARY_PATH} are searched.
+
@item -Wl,-rpath=path
Put custom search path for dynamic libraries into executable.
diff --git a/tcc.c b/tcc.c
index abe1a70a..9b400e71 100644
--- a/tcc.c
+++ b/tcc.c
@@ -98,6 +98,7 @@ static const char help2[] =
" -On same as -D__OPTIMIZE__ for n > 0\n"
" -Wp,-opt same as -opt\n"
" -include file include 'file' above each input file\n"
+ " -nostdlib do not link with standard crt/libs\n"
" -isystem dir add 'dir' to system include path\n"
" -static link to static libraries (not
recommended)\n"
" -dumpversion print version\n"
@@ -132,7 +133,7 @@ static const char help2[] =
" no-sse disable floats on x86_64\n"
#endif
"-Wl,... linker options:\n"
- " -nostdlib do not link with standard crt/libs\n"
+ " -nostdlib do not search standard library paths\n"
" -[no-]whole-archive load lib(s) fully/only as needed\n"
" -export-all-symbols same as -rdynamic\n"
" -export-dynamic same as -rdynamic\n"
diff --git a/tcc.h b/tcc.h
index 44da52f1..fc4d1b6a 100644
--- a/tcc.h
+++ b/tcc.h
@@ -729,6 +729,7 @@ struct TCCState {
unsigned char verbose; /* if true, display some information during
compilation */
unsigned char nostdinc; /* if true, no standard headers are added */
unsigned char nostdlib; /* if true, no standard libraries are added */
+ unsigned char nostdlib_paths; /* if true, the default paths are not
searched for libraries */
unsigned char nocommon; /* if true, do not use common symbols for .bss
data */
unsigned char static_link; /* if true, static linking is performed */
unsigned char rdynamic; /* if true, all symbols are exported */
--
2.48.1
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