Let pkg-config work with cross-compilers
In cross-compiler setups pkg-config often needs some help to
determine the correct libraries. This can be done for example by
setting PKG_CONFIG_LIBDIR to point to the directory where the
cross-compile .pc files are located. If PKG_CONFIG_LIBDIR was not
set already outside of the Makefile we set it according to LIBS_BASE
and add the respective path to the linker's rpath. This makes it
possible to easily cross-compile by only setting CC and LIBS_BASE on
the command line.
This patch also removes the explicit default for LIBS_BASE again
because it does not play well with this change and was a bad idea to
begin with.
Corresponding to flashrom svn r1876.
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/Makefile b/Makefile
index 1f39f41..67b3ef3 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,6 @@
CFLAGS ?= -Os -Wall -Wshadow
EXPORTDIR ?= .
RANLIB ?= ranlib
-LIBS_BASE ?= ..
# The following parameter changes the default programmer that will be used if there is no -p/--programmer
# argument given when running flashrom. The predefined setting does not enable any default so that every
@@ -65,8 +64,11 @@
CFLAGS += -Werror
endif
+ifdef LIBS_BASE
CPPFLAGS += -I$(LIBS_BASE)/include
-LDFLAGS += -L$(LIBS_BASE)/lib
+LDFLAGS += -L$(LIBS_BASE)/lib -Wl,-rpath -Wl,$(LIBS_BASE)/lib
+PKG_CONFIG_LIBDIR ?= $(LIBS_BASE)/lib/pkgconfig
+endif
###############################################################################
# General OS-specific settings.
@@ -613,7 +615,7 @@
endif
ifeq ($(NEED_FTDI), yes)
-FTDILIBS := $(shell pkg-config --libs libftdi 2>/dev/null || printf "%s" "-lftdi -lusb")
+FTDILIBS := $(shell ([ -n "$(PKG_CONFIG_LIBDIR)" ] && export PKG_CONFIG_LIBDIR="$(PKG_CONFIG_LIBDIR)" ); pkg-config --libs libftdi || printf "%s" "-lftdi -lusb")
FEATURE_CFLAGS += $(shell LC_ALL=C grep -q "FT232H := yes" .features && printf "%s" "-D'HAVE_FT232H=1'")
FEATURE_LIBS += $(shell LC_ALL=C grep -q "FTDISUPPORT := yes" .features && printf "%s" "$(FTDILIBS)")
# We can't set NEED_USB here because that would transform libftdi auto-enabling
@@ -736,7 +738,7 @@
ifeq ($(NEED_USB), yes)
CHECK_LIBUSB0 = yes
FEATURE_CFLAGS += -D'NEED_USB=1'
-USBLIBS := $(shell pkg-config --libs libusb 2>/dev/null || printf "%s" "-lusb")
+USBLIBS := $(shell ([ -n "$(PKG_CONFIG_LIBDIR)" ] && export PKG_CONFIG_LIBDIR="$(PKG_CONFIG_LIBDIR)" ); pkg-config --libs libusb || printf "%s" "-lusb")
endif
ifeq ($(CONFIG_PRINT_WIKI), yes)