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authorAndré Schröder <andre.schroedr@gmail.com>2021-08-02 22:43:26 +0000
committerAndré Schröder <andre.schroedr@gmail.com>2021-08-02 22:43:26 +0000
commit587f595f46f7d99d5f7beba5d3fb31dfaabc2d5c (patch)
treea43c483fe9421c8b96c35e576922805009c3315b /CMakeLists.txt
parentfix for llvm 13 (diff)
downloadcgrep-587f595f46f7d99d5f7beba5d3fb31dfaabc2d5c.tar.gz
cgrep-587f595f46f7d99d5f7beba5d3fb31dfaabc2d5c.zip
[patch] Use a reasonable fallback for LLVM_CONF
In #19 I wrote that I couldn't compile the code via $ cmake -B build -S cgrep/ -DUSE_MONOLITH_LIBTOOLING=ON -DCMAKE_CXX_COMPILER=clang++ $ cmake --build build This is because I didn't set LLVM_CONF and it falls back to llvm-config-10. There are two problems with this: First, CMake didn't actually check if LLVM_CONF existed. I now check it via the REQUIRED argument in find_program. Second, my OS (Arch Linux) doesn't name the binary like llvm-config-10 but it's called llvm-config, so the fallback never works on Arch. Thus, I added a non-complete but somewhat reasonable list of possible names.
Diffstat (limited to '')
-rw-r--r--CMakeLists.txt14
1 files changed, 13 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d144b7b..18a1c9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,19 @@ cmake_minimum_required(VERSION 3.14.5)
project(cgrep VERSION 1.1)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)
-set(LLVM_CONF llvm-config-10 CACHE STRING "set the actual name of llvm-config, i.e. llvm-config-10")
+set(LLVM_CONF "" CACHE STRING "set the actual name of llvm-config, i.e. llvm-config-10")
+
+set(LLVM_CONF_TMP "${LLVM_CONF}")
+unset(LLVM_CONF CACHE)
+
+if(LLVM_CONF_TMP STREQUAL "")
+ # If LLVM_CONF wasn't provided, search for it.
+ find_program(LLVM_CONF NAMES llvm-config llvm-config-12 llvm-config-11 llvm-config-10 REQUIRED)
+else()
+ # If LLVM_CONF was provided, check if the executable actually exists.
+ find_program(LLVM_CONF NAMES "${LLVM_CONF_TMP}" REQUIRED)
+endif()
+unset(LLVM_CONF_TMP)
function(CleanMessage)
execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${ARGN}")