[Buildroot] [PATCH 1/2] toolchain/external: only copt the pthread lib if needed

[Yann E. MORIN]

From: Yann E. MORIN <yann.morin.1998 at anciens.enib.fr>

If threads are disabled, do not try to copy the libpthread.so from the
external library.

It is still expected that the BR configuration matches the external
toolchain setup, and no check is done to enforce that.
---
 toolchain/external-toolchain/ext-tool.mk |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/toolchain/external-toolchain/ext-tool.mk b/toolchain/external-toolchain/ext-tool.mk
index bb4809c..e858edb 100644
--- a/toolchain/external-toolchain/ext-tool.mk
+++ b/toolchain/external-toolchain/ext-tool.mk
@@ -251,7 +251,7 @@ check_cross_compiler_exists = \
 
 uclibc: dependencies $(STAMP_DIR)/ext-toolchain-installed
 
-EXTERNAL_LIBS=libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libpthread.so libresolv.so librt.so libutil.so
+EXTERNAL_LIBS=libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libresolv.so librt.so libutil.so
 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
 EXTERNAL_LIBS+=ld-uClibc.so
 else
@@ -262,6 +262,10 @@ ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
 EXTERNAL_LIBS+=libstdc++.so
 endif
 
+ifneq ($(BR2_PTHREADS_NONE),y)
+EXTERNAL_LIBS+=libpthread.so
+endif # ! no threads
+
 # SYSROOT_DIR selection. We first try the -print-sysroot option,
 # available in gcc 4.4.x and in some Codesourcery toolchains. If this
 # option is not available, we fallback to the value of --with-sysroot