package/fluent-bit: rework wasm handling

Fluent-bit isn't very great at supporting the various architectures,
so help a little bit by defining the WAMR_BUILD_TARGET ourselves.

Two failures for MIPS while executing ./utils/test-pkg:

- sourcery-mips64:
core/iwasm/common/arch/invokeNative_mips.s: Assembler messages:
core/iwasm/common/arch/invokeNative_mips.s:58: Error: opcode not supported on this processor: mips64r2 (mips64r2) `ldc1 $f12,0($sp)'
core/iwasm/common/arch/invokeNative_mips.s:59: Error: opcode not supported on this processor: mips64r2 (mips64r2) `ldc1 $f14,8($sp)'
make[4]: *** [src/wasm/CMakeFiles/vmlib-static.dir/build.make:495: src/wasm/CMakeFiles/vmlib-static.dir/__/__/lib/wasm-micro-runtime-WAMR-1.1.1/core/iwasm/common/arch/invokeNative_mips.s.o] Error 1
make[4]: *** Waiting for unfinished jobs....

- sourcery-mips:
core/iwasm/common/arch/invokeNative_mips.s: Assembler messages:
core/iwasm/common/arch/invokeNative_mips.s:58: Error: opcode not supported on this processor: mips32r2 (mips32r2) `ldc1 $f12,0($sp)'
core/iwasm/common/arch/invokeNative_mips.s:59: Error: opcode not supported on this processor: mips32r2 (mips32r2) `ldc1 $f14,8($sp)'
make[4]: *** [src/wasm/CMakeFiles/vmlib-static.dir/build.make:495: src/wasm/CMakeFiles/vmlib-static.dir/__/__/lib/wasm-micro-runtime-WAMR-1.1.1/core/iwasm/common/arch/invokeNative_mips.s.o] Error 1
make[4]: *** Waiting for unfinished jobs....

Which are fixed by setting the obscure flag "WAMR_BUILD_INVOKE_NATIVE_GENERAL".

See https://github.com/bytecodealliance/wasm-micro-runtime/issues/625 for more info:
“Hi, building the invokeNative_general.c explicitly is supported now, please pull the latest code and use

Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/fluent-bit/Config.in

@@ -13,15 +13,21 @@ config BR2_PACKAGE_FLUENT_BIT
 
 if BR2_PACKAGE_FLUENT_BIT
 
+config BR2_PACKAGE_FLUENT_BIT_WASM_ARCH
+	string
+	default "AARCH64"    if BR2_aarch64 || BR2_aarch64be
+	default "ARC"        if BR2_arcle || BR2_arceb
+	default "ARM"        if BR2_arm || BR2_armeb
+	default "MIPS"       if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
+	default "RISCV32"    if BR2_riscv && BR2_RISCV_32
+	default "RISCV64"    if BR2_riscv && BR2_RISCV_64
+	default "X86_32"     if BR2_i386
+	default "X86_64"     if BR2_x86_64
+	default "XTENSA"     if BR2_xtensa
+
 config BR2_PACKAGE_FLUENT_BIT_WASM_ARCH_SUPPORTS
 	bool
-	# see lib/wasm-micro-runtime-WAMR-1.1.1/README.md#supported-architectures-and-platforms
-	default y if BR2_arc
-	default y if BR2_arm || BR2_armeb
-	default y if BR2_aarch64 || BR2_aarch64_be
-	default y if BR2_i386 || BR2_x86_64
-	default y if BR2_RISCV_64
-	default y if BR2_xtensa
+	default y if BR2_PACKAGE_FLUENT_BIT_WASM_ARCH != ""
 
 config BR2_PACKAGE_FLUENT_BIT_WASM
 	bool "wasm runtime support"

package/fluent-bit/fluent-bit.mk

@@ -23,7 +23,17 @@ FLUENT_BIT_CONF_OPTS += \
 	-DFLB_BACKTRACE=No
 
 ifeq ($(BR2_PACKAGE_FLUENT_BIT_WASM),y)
-FLUENT_BIT_CONF_OPTS += -DFLB_WASM=Yes
+FLUENT_BIT_WAMR_ARCH = $(call qstrip,$(BR2_PACKAGE_FLUENT_BIT_WASM_ARCH))
+
+# https://github.com/bytecodealliance/wasm-micro-runtime/issues/625
+# Fix unknown opcode 'ldc1', seen on mips32r2 and mips64r2.
+ifeq ($(FLUENT_BIT_WAMR_ARCH),MIPS)
+FLUENT_BIT_CONF_OPTS += \
+	-DWAMR_BUILD_INVOKE_NATIVE_GENERAL=1
+endif
+
+FLUENT_BIT_CONF_OPTS += -DFLB_WASM=Yes \
+	-DWAMR_BUILD_TARGET=$(FLUENT_BIT_WAMR_ARCH)
 else
 FLUENT_BIT_CONF_OPTS += -DFLB_WASM=No
 endif