add header for ffsll and use builtin if available

sunqm · Oct 20, 2024 · 6a6275a · 6a6275a
1 parent 1a75e6f
commit 6a6275a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/pyscf/lib/CMakeLists.txt b/pyscf/lib/CMakeLists.txt
@@ -15,6 +15,8 @@
 cmake_minimum_required (VERSION 3.5)
 project (pyscf)
 
+include(CheckSymbolExists)
+
 if (NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE RELWITHDEBINFO)
 endif()
@@ -70,6 +72,7 @@ if (NOT BLAS_LIBRARIES)
 #enable_language(Fortran)
 find_package(BLAS)
 endif()
+check_symbol_exists(ffsll "strings.h" HAVE_FFS)
 #check_function_exists(ffsll HAVE_FFS)
 
 if (NOT BLAS_LIBRARIES)