Big patch form Ralf Corsepius described in this email:

  Here is the result of my nightly work to get RTEMS_ROOT=$srcdir working
  with different shells and relative/absolute paths.

  What I did is relatively simple in principle:
  Instead of setting RTEMS_ROOT in configure.in and then let configure
  substitute @RTEMS_ROOT@ inside the Makefiles, I now let each Makefile
  set RTEMS_ROOT from each Makefile's @top_srcdir@ value.

  The difference is subtile, but with enormous side effects:
  - If RTEMS_ROOT is set in configure, then the same single value will be
  propagated to all Makefiles. This breaks using relative paths, as the
  relative path to the root of the source tree is used inside of all
  subdirectory Makefiles.
  - Now each Makefile.in sets RTEMS_ROOT = @top_srcdir@.  top_srcdir  is
  computed individually by configure for each single Makefile.in, hereby
  receiving the correct value, no matter if relative or absolute paths are
  used.

  To get this working, I needed to remove setting RTEMS_ROOT from
  target.cfg.in, because this overrides the value of RTEMS_ROOT from each
  individual Makefile.


  Furthermore, I removed RTEMS_CUSTOM from the Makefiles and replaced all
  "include $(RTEMS_CUSTOM)" directives with"include
  $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP)". Perhaps you don't like this,
  but I think, to have one variable less is clearer and easier to
  understand than having several variables refering to the next one.


  I enclose a small patch to this mail, which
  - fixes the config.h problem (to finally clearify misunderstands)
  - removes assignment/subsitution of RTEMS_ROOT from configure.in
  - contains a workaround for the application Makefile's RTEMS_ROOT
  problem (reported by Eric)
  - removes some unused lines from the toplevel Makefile.in
  - removes assignment of RTEMS_ROOT from make/target.cfg.in

8 files changed, 16 insertions, 32 deletions

diff --git a/c/src/tests/libtests/Makefile.in b/c/src/tests/libtests/Makefile.in
index 4c6694ddde..004100a86e 100644
--- a/c/src/tests/libtests/Makefile.in
+++ b/c/src/tests/libtests/Makefile.in
@@ -4,13 +4,11 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/directory.cfg
 
 # We only build the tests for the rtems++ library if HAS_CPLUSPLUS was defined
diff --git a/c/src/tests/libtests/cpuuse/Makefile.in b/c/src/tests/libtests/cpuuse/Makefile.in
index 8e1644e522..22ef7819d2 100644
--- a/c/src/tests/libtests/cpuuse/Makefile.in
+++ b/c/src/tests/libtests/cpuuse/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 TEST=cpuuse
 
@@ -31,7 +29,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(TEST).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #
diff --git a/c/src/tests/libtests/malloctest/Makefile.in b/c/src/tests/libtests/malloctest/Makefile.in
index 1a49c20da2..ca7c4cb1f6 100644
--- a/c/src/tests/libtests/malloctest/Makefile.in
+++ b/c/src/tests/libtests/malloctest/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 TEST=malloctest
 
@@ -31,7 +29,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(TEST).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #
diff --git a/c/src/tests/libtests/monitor/Makefile.in b/c/src/tests/libtests/monitor/Makefile.in
index c93f2f4647..e264fe9f9b 100644
--- a/c/src/tests/libtests/monitor/Makefile.in
+++ b/c/src/tests/libtests/monitor/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 TEST=monitor
 
@@ -31,7 +29,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(TEST).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #
diff --git a/c/src/tests/libtests/rtems++/Makefile.in b/c/src/tests/libtests/rtems++/Makefile.in
index 69ffdd8d80..f909b618b9 100644
--- a/c/src/tests/libtests/rtems++/Makefile.in
+++ b/c/src/tests/libtests/rtems++/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 TEST=rtems++
 
@@ -31,7 +29,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(TEST).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #
diff --git a/c/src/tests/libtests/rtmonuse/Makefile.in b/c/src/tests/libtests/rtmonuse/Makefile.in
index 37874ff3c0..9c9ea2e366 100644
--- a/c/src/tests/libtests/rtmonuse/Makefile.in
+++ b/c/src/tests/libtests/rtmonuse/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 TEST=rtmonuse
 
@@ -31,7 +29,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(TEST).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #
diff --git a/c/src/tests/libtests/stackchk/Makefile.in b/c/src/tests/libtests/stackchk/Makefile.in
index 1c88e6f604..462f83fb6c 100644
--- a/c/src/tests/libtests/stackchk/Makefile.in
+++ b/c/src/tests/libtests/stackchk/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 TEST=stackchk
 
@@ -31,7 +29,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(TEST).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #
diff --git a/c/src/tests/libtests/termios/Makefile.in b/c/src/tests/libtests/termios/Makefile.in
index d8eebfd8e6..c575570f9e 100644
--- a/c/src/tests/libtests/termios/Makefile.in
+++ b/c/src/tests/libtests/termios/Makefile.in
@@ -4,11 +4,9 @@
 
 @SET_MAKE@
 srcdir = @srcdir@
-top_srcdir = @top_srcdir@
 VPATH = @srcdir@
-RTEMS_ROOT = @RTEMS_ROOT@
+RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
-RTEMS_CUSTOM = $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 
 SAMPLE=termios
 PGM=${ARCH}/$(SAMPLE).exe
@@ -32,7 +30,7 @@ PRINT_SRCS=$(DOCS)
 
 PGM=${ARCH}/$(SAMPLE).exe
 
-include $(RTEMS_CUSTOM)
+include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/leaf.cfg
 
 #