[rtems commit] build: Fix build on Windows

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    9d1f17a9caf6a5a107a8d5395cae6fdfa2099099
Changeset: http://git.rtems.org/rtems/commit/?id=9d1f17a9caf6a5a107a8d5395cae6fdfa2099099

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Thu Oct 11 19:34:35 2018 +0200

build: Fix build on Windows

Avoid a long argument list while creating the librtemscpu.a library
archive.

---

 cpukit/Makefile.am  | 10 ++++++++++
 cpukit/configure.ac | 14 ++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/cpukit/Makefile.am b/cpukit/Makefile.am
index 2a56732..b7a44f3 100644
--- a/cpukit/Makefile.am
+++ b/cpukit/Makefile.am
@@ -1974,3 +1974,13 @@ libmghttpd_a_SOURCES += mghttpd/mongoose.c
 endif
 
 endif
+
+if HACK_TO_AVOID_LONG_ARG_LIST
+
+librtemscpu.a: $(librtemscpu_a_OBJECTS) $(librtemscpu_a_DEPENDENCIES) $(EXTRA_librtemscpu_a_DEPENDENCIES)
+	-rm -f librtemscpu.a librtemscpu.txt
+	for i in $(librtemscpu_a_OBJECTS) ; do echo "$$i" >>librtemscpu.txt ; done
+	$(librtemscpu_a_AR) librtemscpu.a @librtemscpu.txt $(librtemscpu_a_LIBADD)
+	$(RANLIB) librtemscpu.a
+
+endif
diff --git a/cpukit/configure.ac b/cpukit/configure.ac
index 67889d2..2c5e4a1 100644
--- a/cpukit/configure.ac
+++ b/cpukit/configure.ac
@@ -39,6 +39,20 @@ RTEMS_CANONICALIZE_TOOLS
 RTEMS_PROG_CCAS
 AC_PROG_RANLIB
 
+AC_MSG_CHECKING([for a need to avoid a long argument list])
+
+hack_to_avoid_long_arg_list=no
+case "${build_os}" in
+  *cygwin*|*mingw*|*msys*)
+     hack_to_avoid_long_arg_list=yes
+     ;;
+   *)
+     ;;
+esac
+
+AC_MSG_RESULT([${hack_to_avoid_long_arg_list}])
+AM_CONDITIONAL([HACK_TO_AVOID_LONG_ARG_LIST], [test "${hack_to_avoid_long_arg_list}" = yes])
+
 RTEMS_CHECK_NEWLIB
 
 # BSD-isms, used throughout the sources