Feat/wasm syntax checker

.gitignore

@@ -68,3 +68,8 @@ tests/vla_test
 tests/hello
 tests/tests2/fred.txt
 libtcc.dylib
+
+em_include
+*.data
+*.wasm
+*.mjs

Makefile

@@ -129,6 +129,9 @@ TCCDOCS = tcc.1 tcc-doc.html tcc-doc.info
 
 all: $(PROGS) $(TCCLIBS) $(TCCDOCS)
 
+syntax_check.wasm: syntax_check.c libtcc.c tccpp.c tccgen.c tcc-stubs.c
+	bash embuild.sh
+
 # cross compiler targets to build
 TCC_X = i386 x86_64 i386-win32 x86_64-win32 x86_64-osx arm arm64 arm-wince c67
 TCC_X += riscv64 arm64-osx

build_syntax_checker.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -e
+
+CC="${CC:-musl-gcc}"
+# on O0 missing dead code elimination triggers linker errors
+CFLAGS="-DTCC_SYNTAX_ONLY -ggdb -O2 -DONE_SOURCE=1"
+LDFLAGS="-static"
+OUTPUT="syntax_check_file"
+LIBRARY="libtcc-syntax.a"
+
+$CC $CFLAGS $LDFLAGS -o $OUTPUT syntax_check_file.c tcc-stubs.c libtcc.c tccpp.c tccgen.c -I.

embuild.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e
+
+CC="${CC:-emcc}"
+CFLAGS="-DTCC_SYNTAX_ONLY -DTCC_TARGET_X86_64 -DPTR_SIZE=8 -DLONG_SIZE=8 -O3 -DONE_SOURCE=1"
+LDFLAGS="-sINITIAL_MEMORY=33554432 -sEXPORTED_RUNTIME_METHODS=ccall,UTF8ToString,stackAlloc -sEXPORTED_FUNCTIONS=_check_syntax,_get_type_info_buffer,_get_type_info_length,_get_debug_calls_buffer,_get_debug_calls_length,_get_error_count,_get_error,_get_error_filename,_get_error_line_num,_get_error_is_warning,_get_error_msg -sENVIRONMENT=worker -sEXIT_RUNTIME=0 -sSTRICT=1"
+OUTPUT="syntax_check.mjs"
+WARNS="-Wno-string-plus-int -Wno-undefined-internal"
+
+rm -f $OUTPUT syntax_check.wasm
+
+mv em_include/task.h.pch .
+$CC -sEXPORT_NAME=TCC -sMODULARIZE=1 -sEVAL_CTORS -sWASM_BIGINT -flto $WARNS $CFLAGS $LDFLAGS -o $OUTPUT syntax_check.c libtcc.c tccpp.c tccgen.c tcc-stubs.c -I. --preload-file em_include@/
+mv task.h.pch em_include/