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[Xen-devel] [PATCH] stubdom: allow to build with older tool chain



GNU make prior to 3.81 doesn't support $(realpath ...). This fixes a
regression introduced in 23368:0f670f5146c8 (the option tested via
cc-option-add got interpreted as the argument of the -I compiler
option, as its intended argument was blank, and hence the compiler was
falsely considered to support *any* option in the pciutils sub-tree).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/Config.mk
+++ b/Config.mk
@@ -4,6 +4,9 @@ ifeq ($(filter /%,$(XEN_ROOT)),)
 $(error XEN_ROOT must be absolute)
 endif
 
+# fallback for older make
+realpath = $(wildcard $(foreach file,$(1),$(shell cd -P $(dir $(file)) && echo 
"$$PWD/$(notdir $(file))")))
+
 -include $(XEN_ROOT)/.config
 
 # A debug build of Xen and tools?
--- a/stubdom/Makefile
+++ b/stubdom/Makefile
@@ -158,7 +158,7 @@ $(LIBPCI_STAMPFILE): pciutils-$(XEN_TARG
          chmod u+w lib/config.h && \
          echo '#define PCILIB_VERSION "$(LIBPCI_VERSION)"' >> lib/config.h && \
          ln -sf ../../libpci.config.mak lib/config.mk && \
-         $(CROSS_MAKE) CC="$(CC) $(TARGET_CPPFLAGS) $(TARGET_CFLAGS) 
-I$(realpath $(MINI_OS)/include)" lib/libpci.a && \
+         $(CROSS_MAKE) CC="$(CC) $(TARGET_CPPFLAGS) $(TARGET_CFLAGS) -I$(call 
realpath,$(MINI_OS)/include)" lib/libpci.a && \
          $(INSTALL_DATA) lib/libpci.a 
$(CROSS_PREFIX)/$(GNU_TARGET_ARCH)-xen-elf/lib/ && \
          $(INSTALL_DIR) $(CROSS_PREFIX)/$(GNU_TARGET_ARCH)-xen-elf/include/pci 
&& \
          $(INSTALL_DATA) lib/config.h lib/header.h lib/pci.h lib/types.h 
$(CROSS_PREFIX)/$(GNU_TARGET_ARCH)-xen-elf/include/pci/ \



Attachment: stubdom-realpath-old-make.patch
Description: Text document

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