From 5fcf9e163a4657ee990fc3acacf851c8fb784cfc Mon Sep 17 00:00:00 2001
From: Eduard Valeyev <eduard@valeyev.net>
Date: Wed, 25 Sep 2024 10:21:02 -0400
Subject: [PATCH] [ci] try ccaching

---
 CMakeLists.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb714ec9..86384d4d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -164,6 +164,15 @@ if( BTAS_USE_BLAS_LAPACK )
 endif()
 include(external/boost.cmake)
 
+# optional dependency: ccache
+find_program(CCACHE ccache)
+if(CCACHE)
+  mark_as_advanced(CCACHE)
+  message (STATUS "Found ccache: ${CCACHE}")
+  set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE}" CACHE STRING "Compiler launcher to use for compiling C++")
+  set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE}" CACHE STRING "Compiler launcher to use for compiling C")
+endif(CCACHE)
+
 ##########################
 # configure BTAS_ASSERT
 ##########################