From e843db55ae3f1153273380a628979ce5f1c50011 Mon Sep 17 00:00:00 2001
From: Marius Greuel <greuelm@mgtek.com>
Date: Mon, 3 Jan 2022 12:57:58 +0100
Subject: [PATCH] Use yacc/byacc as an alternative to bison
---
src/CMakeLists.txt | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 89e92c0f..cb87d3d1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -37,12 +37,13 @@ option(DEBUG_CMAKE "Enable debugging output for this CMake project" OFF)
include(CheckIncludeFile)
include(CheckFunctionExists)
include(GNUInstallDirs)
+include(FindPackageMessage)
set(CONFIG_DIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}")
set(AVRDUDE_EXTERNAL_PATH "${PROJECT_SOURCE_DIR}/external")
# =====================================
-# Detect Flex and Bison
+# Detect flex and yacc/bison
# =====================================
find_package(FLEX)
@@ -56,11 +57,26 @@ else()
message(SEND_ERROR "This CMake project requires 'flex', which is not installed on your system." )
endif()
-find_package(BISON)
+find_package(BISON QUIET)
if(BISON_FOUND)
+ find_package_message(BISON "Found BISON: ${BISON_EXECUTABLE} (found version \"${BISON_VERSION}\")" "[${BISON_EXECUTABLE}][${BISON_VERSION}]")
BISON_TARGET(Parser config_gram.y "${PROJECT_BINARY_DIR}/config_gram.c" DEFINES_FILE "${PROJECT_BINARY_DIR}/config_gram.h")
else()
- message(SEND_ERROR "This CMake project requires 'bison', which is not installed on your system." )
+ find_program(YACC_EXECUTABLE NAMES yacc byacc DOC "path to the yacc executable")
+ mark_as_advanced(YACC_EXECUTABLE)
+ if(YACC_EXECUTABLE)
+ find_package_message(YACC "Found YACC: ${YACC_EXECUTABLE}" "[${YACC_EXECUTABLE}]")
+ set(YACC_TARGET_outputs "${PROJECT_BINARY_DIR}/config_gram.c")
+ add_custom_command(OUTPUT ${YACC_TARGET_outputs}
+ COMMAND ${YACC_EXECUTABLE} -d -o ${YACC_TARGET_outputs} config_gram.y
+ VERBATIM
+ COMMENT "[YACC][Parser] Building parser with yacc"
+ WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+ )
+ set(BISON_Parser_OUTPUTS ${YACC_TARGET_outputs})
+ else()
+ message(SEND_ERROR "This CMake project requires 'bison', 'yacc', or 'byacc', which is not installed on your system." )
+ endif()
endif()
# =====================================