[commit] r1048 - trunk

[repository service]

Author: hailfinger
Date: Mon Jun 14 20:40:59 2010
New Revision: 1048
URL: http://flashrom.org/trac/coreboot/changeset/1048

Log:
Detect incompatible CONFIG_FOO=yes for the specified target and refuse
to compile with a meaningful error message.
Set the default for incompatible CONFIG_FOO to no.

Just running "make" should result in a a build which compiles the common
subset of available and working features.

Signed-off-by: Carl-Daniel Hailfinger 
Acked-by: Idwer Vollering

Modified:
   trunk/Makefile

Modified: trunk/Makefile
==============================================================================
--- trunk/Makefile	Mon Jun 14 16:44:08 2010	(r1047)
+++ trunk/Makefile	Mon Jun 14 20:40:59 2010	(r1048)
@@ -53,9 +53,28 @@
 CPPFLAGS += -I../libgetopt -I../libpci/include
 # FIXME Check if we can achieve the same effect with -L../libgetopt -lgetopt
 LIBS += ../libgetopt/libgetopt.a
-# Bus Pirate and Serprog are not supported under DOS.
-CONFIG_BUSPIRATE_SPI = no
-CONFIG_SERPROG = no
+# Bus Pirate and Serprog are not supported under DOS (missing serial support).
+ifeq ($(CONFIG_BUSPIRATE_SPI), yes)
+UNSUPPORTED_FEATURES += CONFIG_BUSPIRATE_SPI=yes
+else
+override CONFIG_BUSPIRATE_SPI = no
+endif
+ifeq ($(CONFIG_SERPROG), yes)
+UNSUPPORTED_FEATURES += CONFIG_SERPROG=yes
+else
+override CONFIG_SERPROG = no
+endif
+# Dediprog and FT2232 are not supported under DOS (missing USB support).
+ifeq ($(CONFIG_DEDIPROG), yes)
+UNSUPPORTED_FEATURES += CONFIG_DEDIPROG=yes
+else
+override CONFIG_DEDIPROG = no
+endif
+ifeq ($(CONFIG_FT2232_SPI), yes)
+UNSUPPORTED_FEATURES += CONFIG_FT2232_SPI=yes
+else
+override CONFIG_FT2232_SPI = no
+endif
 endif

CHIP_OBJS = jedec.o stm50flw0x0x.o w39v040c.o w39v080fa.o w29ee011.o \
@@ -279,7 +298,7 @@
 strip: $(PROGRAM)$(EXEC_SUFFIX)
    $(STRIP) $(STRIP_ARGS) $(PROGRAM)$(EXEC_SUFFIX)

-compiler:
+compiler: featuresavailable
    @printf "Checking for a C compiler... "
    @$(shell ( echo "int main(int argc, char **argv)"; \
    	   echo "{ return 0; }"; ) > .test.c )
@@ -318,6 +337,17 @@

.features: features

+# If a user does not explicitly request a non-working feature, we should
+# silently disable it. However, if a non-working (does not compile) feature
+# is explicitly requested, we should bail out with a descriptive error message.
+ifeq ($(UNSUPPORTED_FEATURES), )
+featuresavailable:
+else
+featuresavailable:
+	@echo "The following features are unavailable on your machine: $(UNSUPPORTED_FEATURES)"
+	@false
+endif
+
 ifeq ($(CONFIG_FT2232_SPI), yes)
 features: compiler
    @echo "FEATURES := yes" > .features.tmp
@@ -375,6 +405,6 @@
 djgpp-dos: clean
    make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip WARNERROR=no OS_ARCH=DOS

-.PHONY: all clean distclean compiler pciutils features export tarball dos
+.PHONY: all clean distclean compiler pciutils features export tarball dos featuresavailable

-include $(OBJS:.o=.d)