From e5f2b87c6bf263fb04fca17aa46f36d2595b5b6e Mon Sep 17 00:00:00 2001
From: Kubat <mael.martin31@gmail.com>
Date: Wed, 16 Feb 2022 21:38:17 +0100
Subject: [PATCH] WIP: Try to check for OpenMP support by the compilers
---
CMakeLists.txt | 20 ++++++++++++++++++--
README.md | 3 +++
utils/cmake/TestOpenMP.c | 14 ++++++++++++++
3 files changed, 35 insertions(+), 2 deletions(-)
create mode 100644 utils/cmake/TestOpenMP.c
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 508562cb..f9bfbe9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -228,6 +228,22 @@ set(SQL_SOURCE_FILES
${CMAKE_CURRENT_SOURCE_DIR}/src/database/memory.sql
)
+### ###
+# TEST OPENMP #
+### ###
+
+try_compile(OPENMP_SUPPORT_OK
+ ${CMAKE_BINARY_DIR/___openmp_test_ok
+ ${CMAKE_CURRENT_SOURCE_DIR}/utils/cmake/TestOpenMP.c}
+ LINK_LIBRARIES -fopenmp
+)
+
+if(OPENMP_SUPPORT_OK)
+ message(STATUS "Compiler has OpenMP support")
+else()
+ message(FATAL_ERROR "Compiler doesn't have OpenMP support")
+endif()
+
### ###
# THE COMPILATION DIRECTIVES #
### ###
@@ -258,8 +274,8 @@ else()
${SQL_GENERATED_FILE}
)
endif()
-add_executable(lkt ${lkt_SOURCES})
-add_executable(luka ${luka_SOURCES} ${SQL_GENERATED_FILE})
+add_executable(lkt ${lkt_SOURCES})
+add_executable(luka ${luka_SOURCES} ${SQL_GENERATED_FILE})
set(MANPAGES_COMMANDS)
if(GENERATE_MANPAGES)
diff --git a/README.md b/README.md
index 3467535e..6bf616d8 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@ A Karaoke player made to replace the old bash scripts on Sakura.
- [cmake](https://cmake.org/) with at least the version 3.17
- a C compiler with C11 support
+- a C++ compiler with C++20 support (for the Qt5 module)
+- The C and C++ compilers must have OpenMP support (see the
+ [OpenMP C test program](utils/cmake/TestOpenMp.c))
- the [sqlite3](https://www.sqlite.org/) development library, version
3.31.0 or newer for [generated columns](https://www.sqlite.org/gencol.html) support
- a POSIX.1-2008 compatible system (for MS Windows, use something like WSL2)
diff --git a/utils/cmake/TestOpenMP.c b/utils/cmake/TestOpenMP.c
new file mode 100644
index 00000000..63c7d73b
--- /dev/null
+++ b/utils/cmake/TestOpenMP.c
@@ -0,0 +1,14 @@
+int
+main(void)
+{
+ int res = 0;
+ int A[10];
+ memset(&A, 1, sizeof(A));
+
+ #pragma omp parallel for shared(A, res) reduction (+res)
+ for (int i = 0; i < 10; i += 1) {
+ res += A[i]
+ }
+
+ return res;
+}
\ No newline at end of file
--
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