#!/bin/bash

# We grep error messages so we need to be in a suitable default locale. Sorry!
export LANG=C

tmpfile="/tmp/$$"
trap "rm -f '$tmpfile'*" 0

@REAL_CC@ "$@" > "$tmpfile" 2>&1
status=$?

if [[ $status -ne 0 ]]; then
	CC="@REAL_CC@"
	CC="${CC%% *}"
	CC="${CC##*/}"

	# Try eliminating known issues
	OVERRIDE_CFLAGS=()
	if [[ "$CC" = 'gcc' ]]; then
		if grep "declaration of '__cancel_buf' shadows a previous local" "$tmpfile" > /dev/null 2>&1; then
			# There's a nested pthread_cleanup_push...pthread_cleanup_pop
			echo "*** Ignoring pthread cleanup nesting"
			OVERRIDE_CFLAGS[${#OVERRIDE_CFLAGS[@]}]='-Wno-shadow'
		fi
	elif [[ "$CC" = 'icc' ]]; then
		if grep 'error #1599: declaration hides variable "__cancel_buf"' "$tmpfile" > /dev/null 2>&1; then
			# There's a nested pthread_cleanup_push...pthread_cleanup_pop
			echo "*** Ignoring pthread cleanup nesting"
			OVERRIDE_CFLAGS[${#OVERRIDE_CFLAGS[@]}]='-wd1599'
		fi

		if grep 'error #1419: external declaration in primary source file' "$tmpfile" > /dev/null 2>&1; then
			# Unavoidable with YACC/Bison output and _sometimes_ convenient
			echo "*** Ignoring external declarations in primary source file"
			OVERRIDE_CFLAGS[${#OVERRIDE_CFLAGS[@]}]='-wd1419'
		fi

		if grep 'error #2215: definition at end of file not followed by a semicolon or a declarator' "$tmpfile" > /dev/null 2>&1; then
			# YACC/Bison generates not-quite-valid code for %union
			# and may define exernal functions with no previous declaration
			echo "*** Ignoring missing semicolon at end of file (YACC/Bison generated code?)"
			OVERRIDE_CFLAGS[${#OVERRIDE_CFLAGS[@]}]='-wd2215'
			OVERRIDE_CFLAGS[${#OVERRIDE_CFLAGS[@]}]='-wd1418'
		fi
	fi

	if [[ ${#OVERRIDE_CFLAGS[@]} -ne 0 ]]; then
		echo "*** Retrying using: ${OVERRIDE_CFLAGS[@]}"
		@REAL_CC@ "$@" "${OVERRIDE_CFLAGS[@]}" > "$tmpfile" 2>&1
		status=$?
	fi

	# If it still fails try eliminating preprocessor compile time optimizations.
	# If that fails show the error messages from that attempt. If it succeeds show
	# the error messages we had previously.
	if [[ $status -ne 0 ]]; then
		echo "*** Retry without preprocessor compile time optimizations"
		@REAL_CC@ -DCW_DEBUG_COMPILE "$@" "${OVERRIDE_CFLAGS[@]}" > "$tmpfile.2" 2>&1
		[[ $? -ne 0 ]] && mv -f "$tmpfile.2" "$tmpfile"
		status=1
	fi
fi

cat "$tmpfile"
exit $status