rules: minimize $(shell ..) usage during startup

These call take time and make things like 'ptxdist print ...' noticeably
slower.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

7 files changed, 15 insertions, 9 deletions

diff --git a/rules/ca-certificates.make b/rules/ca-certificates.make
index 0770411f7..613aae716 100644
--- a/rules/ca-certificates.make
+++ b/rules/ca-certificates.make
@@ -26,8 +26,9 @@ CA_CERTIFICATES_URL		:= https://hg.mozilla.org/releases/mozilla-release/raw-file
 CA_CERTIFICATES_SOURCE		:= $(SRCDIR)/certdata-$(CA_CERTIFICATES_VERSION).$(CA_CERTIFICATES_SUFFIX)
 CA_CERTIFICATES_DIR		:= $(BUILDDIR)/$(CA_CERTIFICATES)
 CA_CERTIFICATES_LICENSE		:= MPL-2.0
-CA_CERTIFICATES_CERTDATA2PEM	:= $(shell ptxd_in_path PTXDIST_PATH_SCRIPTS certdata2pem.py && echo "$${ptxd_reply}")
-CA_CERTIFICATES_BLACKLIST	:= $(shell ptxd_get_alternative config/ca-certificates blacklist.txt && echo "$${ptxd_reply}")
+# Use '=' to delay $(shell ...) calls until this is needed
+CA_CERTIFICATES_CERTDATA2PEM	 = $(shell ptxd_in_path PTXDIST_PATH_SCRIPTS certdata2pem.py && echo "$${ptxd_reply}")
+CA_CERTIFICATES_BLACKLIST	 = $(shell ptxd_get_alternative config/ca-certificates blacklist.txt && echo "$${ptxd_reply}")
 
 # ----------------------------------------------------------------------------
 # Extract
diff --git a/rules/dtc.make b/rules/dtc.make
index d5eb48576..22a05e7e6 100644
--- a/rules/dtc.make
+++ b/rules/dtc.make
@@ -27,7 +27,7 @@ ptx/dts = $(shell p=$(PTXCONF_DTC_OFTREE_DTS_PATH) ptxd_in_path p "$(strip $(1))
 
 ifdef PTXCONF_DTC_OFTREE_DTS
 # Note: this must match the magic in ptxd_make_dts_dtb
-DTC_OFTREE_DTS = $(foreach dts, $(call remove_quotes,$(PTXCONF_DTC_OFTREE_DTS)), \
+DTC_OFTREE_DTS := $(foreach dts, $(call remove_quotes,$(PTXCONF_DTC_OFTREE_DTS)), \
 	$(if $(filter /%,$(dts)),$(dts),$(call ptx/dts,$(dts))))
 endif
 
diff --git a/rules/host-qemu.make b/rules/host-qemu.make
index 95ee0e6a1..e5cdced54 100644
--- a/rules/host-qemu.make
+++ b/rules/host-qemu.make
@@ -141,11 +141,12 @@ HOST_QEMU_CONF_OPT	:= \
 	$(call ptx/ifdef, PTXCONF_HOST_QEMU_SYS,--with-system-pixman,--without-pixman) \
 	--enable-vhost-scsi
 
-QEMU_CROSS_QEMU := $(shell ptxd_get_alternative config/qemu qemu-cross && echo $$ptxd_reply)
+# Use '=' to delay $(shell ...) calls until this is needed
+QEMU_CROSS_QEMU = $(shell ptxd_get_alternative config/qemu qemu-cross && echo $$ptxd_reply)
 QEMU_CROSS_DL = $(shell ptxd_cross_cc_v | sed -n -e 's/.* -dynamic-linker \([^ ]*\).*/\1/p')
 QEMU_CROSS_LD_LIBRARY_PATH := $(PTXDIST_SYSROOT_TOOLCHAIN)/lib:$(SYSROOT)/$(CROSS_LIB_DIR):$(SYSROOT)/usr/$(CROSS_LIB_DIR)
 
-QEMU_CROSS_QEMU_ENV := \
+QEMU_CROSS_QEMU_ENV = \
 	QEMU="$(PTXDIST_SYSROOT_HOST)/bin/qemu-$(HOST_QEMU_TARGETS)" \
 	KERNEL_VERSION="$(KERNEL_VERSION)" \
 	QEMU_LD_PREFIX="$(PTXDIST_SYSROOT_TOOLCHAIN)" \
diff --git a/rules/hostapd.make b/rules/hostapd.make
index 26d7ea47c..14d71c549 100644
--- a/rules/hostapd.make
+++ b/rules/hostapd.make
@@ -26,7 +26,8 @@ HOSTAPD_URL	:= http://w1.fi/releases/$(HOSTAPD).$(HOSTAPD_SUFFIX)
 HOSTAPD_SOURCE	:= $(SRCDIR)/$(HOSTAPD).$(HOSTAPD_SUFFIX)
 HOSTAPD_DIR	:= $(BUILDDIR)/$(HOSTAPD)
 HOSTAPD_SUBDIR	:= $(HOSTAPD_NAME)
-HOSTAPD_DEFCONF	:= $(shell ptxd_get_alternative config/hostapd defconfig && echo $$ptxd_reply)
+# Use '=' to delay $(shell ...) calls until this is needed
+HOSTAPD_DEFCONF	 = $(shell ptxd_get_alternative config/hostapd defconfig && echo $$ptxd_reply)
 HOSTAPD_CONFIG	:= $(BUILDDIR)/$(HOSTAPD)/$(HOSTAPD_SUBDIR)/.config
 HOSTAPD_LICENSE	:= BSD-3-Clause
 HOSTAPD_LICENSE_FILES := \
diff --git a/rules/libgpg-error.make b/rules/libgpg-error.make
index 362f7bc6a..90ceec18e 100644
--- a/rules/libgpg-error.make
+++ b/rules/libgpg-error.make
@@ -32,7 +32,8 @@ LIBGPG_ERROR_LICENSE_FILES := \
 	file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
 	file://COPYING.LIB;md5=2d5025d4aa3495befef8f17206a5b0a1
 
-LIBGPG_ERROR_TARGET	:= $(patsubst i%86-pc-linux-gnu,i686-pc-linux-gnu,$(shell target=$(PTXCONF_GNU_TARGET); echo $${target/-*-linux/-$(if $(PTXCONF_ARCH_X86),pc,unknown)-linux}))
+# Use '=' to delay $(shell ...) calls until this is needed
+LIBGPG_ERROR_TARGET	= $(patsubst i%86-pc-linux-gnu,i686-pc-linux-gnu,$(shell target=$(PTXCONF_GNU_TARGET); echo $${target/-*-linux/-$(if $(PTXCONF_ARCH_X86),pc,unknown)-linux}))
 
 # ----------------------------------------------------------------------------
 # Prepare
diff --git a/rules/nodejs.make b/rules/nodejs.make
index 153f393da..f469db1d6 100644
--- a/rules/nodejs.make
+++ b/rules/nodejs.make
@@ -102,7 +102,8 @@ NODEJS_ARM_FPU = $(shell ptxd_cross_cc_v | sed -n "s/COLLECT_GCC_OPTIONS=.*'-mfp
 endif
 
 NODEJS_CONF_TOOL := autoconf
-NODEJS_CONF_OPT := \
+# Use '=' to delay $(shell ...) calls until this is needed
+NODEJS_CONF_OPT = \
 	--prefix=/usr \
 	--dest-cpu=$(NODEJS_ARCH) \
 	--dest-os=linux \
diff --git a/rules/wpa_supplicant.make b/rules/wpa_supplicant.make
index db4805b77..1646d8b47 100644
--- a/rules/wpa_supplicant.make
+++ b/rules/wpa_supplicant.make
@@ -25,7 +25,8 @@ WPA_SUPPLICANT_URL	:= http://hostap.epitest.fi/releases/$(WPA_SUPPLICANT).$(WPA_
 WPA_SUPPLICANT_SOURCE	:= $(SRCDIR)/$(WPA_SUPPLICANT).$(WPA_SUPPLICANT_SUFFIX)
 WPA_SUPPLICANT_DIR	:= $(BUILDDIR)/$(WPA_SUPPLICANT)
 WPA_SUPPLICANT_SUBDIR	:= $(WPA_SUPPLICANT_NAME)
-WPA_SUPPLICANT_DEFCONF	:= $(shell ptxd_get_alternative config/wpasupplicant defconfig && echo $$ptxd_reply)
+# Use '=' to delay $(shell ...) calls until this is needed
+WPA_SUPPLICANT_DEFCONF	 = $(shell ptxd_get_alternative config/wpasupplicant defconfig && echo $$ptxd_reply)
 WPA_SUPPLICANT_CONFIG	:= $(BUILDDIR)/$(WPA_SUPPLICANT)/$(WPA_SUPPLICANT_SUBDIR)/.config
 WPA_SUPPLICANT_LICENSE	:= GPL-2.0