package/flashrom: fix build on riscv

Retrieve an upstream patch to fix build with riscv as it fails to
retrieve architecture due to "Use sigaction with SA_RESTART instead"
being caught before riscv:

exec: export LC_ALL=C ; { /home/fabrice/buildroot/output/host/bin/riscv32-linux-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -E archtest.c 2>/dev/null | grep -v ^# | grep ' | cut -f 2 -d' ; }
Use sigaction with SA_RESTART instead
riscv

Fixes:
 - http://autobuild.buildroot.org/results/61ac6c9bfcd3bd9306aa49faf47b9f16e5abe846

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 7d73bc52164afbb283d0d8723ed4cf0cbca38521)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/flashrom/0001-Makefile-Fix-building-on-AArch64-NixOS.patch

@@ -0,0 +1,95 @@
+From da6b3b70cb852dd8e9f9e21aef95fa83e7f7ab0d Mon Sep 17 00:00:00 2001
+From: Pyry Kontio <pyry.kontio@drasa.eu>
+Date: Mon, 6 Jul 2020 12:57:35 +0900
+Subject: [PATCH] Makefile: Fix building on AArch64 NixOS
+
+The parsing of the output of archtest.c produced an unexpected
+value on AArch64 NixOS. For example, the make variable ARCH was set to:
+
+```
+bit outside of fd_set selected
+arm
+```
+
+This made the arch and OS checks fail.
+
+This commit simplifies the parsing, making it more robust.
+
+The C files archtest.c, endiantest.c and os.h used to set the
+TARGET_OS, ARCH and ENDIAN variables, respectively, output
+the result of the test as the final line, so just extracting
+the final line and removing double quoting is enough.
+
+This commit also fixes a bug with debug_shell lacking escaping
+single quotes, which prevented using the single quote in the
+debug_shell calls. It used to work by accident before this fix;
+the line in the call happened to contain a balanced pair of double
+quotes and lacked other characters that needed escaping, which
+didn't break the debug_shell, but this was accidental and very
+brittle.
+
+Signed-off-by: Pyry Kontio <pyry.kontio@drasa.eu>
+Change-Id: Iaa4477a71e758cf9ecad2c22f3b77bc6508a3510
+Reviewed-on: https://review.coreboot.org/c/flashrom/+/43140
+Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
+Reviewed-by: Angel Pons <th3fanbus@gmail.com>
+
+[Retrieved from:
+https://github.com/flashrom/flashrom/commit/da6b3b70cb852dd8e9f9e21aef95fa83e7f7ab0d]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ Makefile | 16 ++++++++++------
+ 1 file changed, 10 insertions(+), 6 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index f3f7717e2..e475cbdbd 100644
+--- a/Makefile
++++ b/Makefile
+@@ -83,7 +83,8 @@ dummy_for_make_3_80:=$(shell printf "Build started on %s\n\n" "$$(date)" >$(BUIL
+ 
+ # Provide an easy way to execute a command, print its output to stdout and capture any error message on stderr
+ # in the build details file together with the original stdout output.
+-debug_shell = $(shell export LC_ALL=C ; { echo 'exec: export LC_ALL=C ; { $(1) ; }' >&2;  { $(1) ; } | tee -a $(BUILD_DETAILS_FILE) ; echo >&2 ; } 2>>$(BUILD_DETAILS_FILE))
++debug_shell = $(shell export LC_ALL=C ; { echo 'exec: export LC_ALL=C ; { $(subst ','\'',$(1)) ; }' >&2; \
++    { $(1) ; } | tee -a $(BUILD_DETAILS_FILE) ; echo >&2 ; } 2>>$(BUILD_DETAILS_FILE))
+ 
+ ###############################################################################
+ # General OS-specific settings.
+@@ -106,7 +107,8 @@ endif
+ # IMPORTANT: The following line must be placed before TARGET_OS is ever used
+ # (of course), but should come after any lines setting CC because the line
+ # below uses CC itself.
+-override TARGET_OS := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E os.h 2>/dev/null | grep -v '^\#' | grep '"' | cut -f 2 -d'"'))
++override TARGET_OS := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E os.h 2>/dev/null \
++    | tail -1 | cut -f 2 -d'"'))
+ 
+ ifeq ($(TARGET_OS), Darwin)
+ override CPPFLAGS += -I/opt/local/include -I/usr/local/include
+@@ -490,8 +492,10 @@ endif
+ # IMPORTANT: The following line must be placed before ARCH is ever used
+ # (of course), but should come after any lines setting CC because the line
+ # below uses CC itself.
+-override ARCH := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E archtest.c 2>/dev/null | grep -v '^\#' | grep '"' | cut -f 2 -d'"'))
+-override ENDIAN := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E endiantest.c 2>/dev/null | grep -v '^\#'))
++override ARCH := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E archtest.c 2>/dev/null \
++    | tail -1 | cut -f 2 -d'"'))
++override ENDIAN := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E endiantest.c 2>/dev/null \
++    | tail -1))
+ 
+ # Disable the internal programmer on unsupported architectures (everything but x86 and mipsel)
+ ifneq ($(ARCH)-little, $(filter $(ARCH),x86 mips)-$(ENDIAN))
+@@ -1299,12 +1303,12 @@ compiler: featuresavailable
+ 	@printf "Target arch is "
+ 	@# FreeBSD wc will output extraneous whitespace.
+ 	@echo $(ARCH)|wc -w|grep -q '^[[:blank:]]*1[[:blank:]]*$$' ||	\
+-		( echo "unknown. Aborting."; exit 1)
++		( echo "unknown (\"$(ARCH)\"). Aborting."; exit 1)
+ 	@printf "%s\n" '$(ARCH)'
+ 	@printf "Target OS is "
+ 	@# FreeBSD wc will output extraneous whitespace.
+ 	@echo $(TARGET_OS)|wc -w|grep -q '^[[:blank:]]*1[[:blank:]]*$$' ||	\
+-		( echo "unknown. Aborting."; exit 1)
++		( echo "unknown (\"$(TARGET_OS)\"). Aborting."; exit 1)
+ 	@printf "%s\n" '$(TARGET_OS)'
+ ifeq ($(TARGET_OS), libpayload)
+ 	@$(CC) --version 2>&1 | grep -q coreboot || \