android,build: different host flags for linking

Use different flags for linking depending on host_os, since macOS
doesn't support --start-group and --end-group on clang.

Author: jaimecbernardo

tools/gyp/pylib/gyp/generator/make.py

@@ -201,7 +201,12 @@ def CalculateGeneratorInputInfo(params):
 quiet_cmd_link = LINK($(TOOLSET)) $@
 quiet_cmd_link_host = LINK($(TOOLSET)) $@
 cmd_link = $(LINK.$(TOOLSET)) $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o $@ -Wl,--start-group $(LD_INPUTS) -Wl,--end-group $(LIBS)
+# If building on MacOS, --start-group and --end-group won't be supported in clang.
+ifeq ($(shell uname -s),Darwin) then
+cmd_link_host = $(LINK.$(TOOLSET)) $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o $@ $(LD_INPUTS) $(LIBS)
+else
 cmd_link_host = $(LINK.$(TOOLSET)) $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o $@ -Wl,--start-group $(LD_INPUTS) -Wl,--end-group $(LIBS)
+endif
 
 # Other shared-object link notes:
 # - Set SONAME to the library filename so our binaries don't reference