add cmake option to enable pch

Author: pcaspers

CMakeLists.txt

@@ -61,6 +61,7 @@ option(QL_INSTALL_EXAMPLES "Install examples" ON)
 option(QL_INSTALL_TEST_SUITE "Install test suite" ON)
 option(QL_TAGGED_LAYOUT "Library names use layout tags" ${MSVC})
 option(QL_USE_CLANG_TIDY "Use clang-tidy when building" OFF)
+option(QL_USE_PCH "Use precompiled headers" OFF)
 # Deleted from QL 1.27
 option(QL_USE_DISPOSABLE "Use the Disposable class template. Not needed for C++11" OFF)
 option(QL_USE_INDEXED_COUPON "Use indexed coupons instead of par coupons" OFF)

ql/CMakeLists.txt

@@ -2357,6 +2357,24 @@ set_target_properties(ql_library PROPERTIES
     VERSION ${QUANTLIB_VERSION}
     SOVERSION ${QUANTLIB_VERSION_MAJOR})
 
+if (QL_USE_PCH)
+target_precompile_headers(ql_library
+  PUBLIC
+    <ql/any.hpp>
+    <ql/errors.hpp>
+    <ql/index.hpp>
+    <ql/indexes/indexmanager.hpp>
+    <ql/instrument.hpp>
+    <ql/indexes/interestrateindex.hpp>
+    <ql/math/array.hpp>
+    <ql/math/interpolations/cubicinterpolation.hpp>
+    <ql/math/matrix.hpp>
+    <ql/methods/finitedifferences/operators/fdmlinearop.hpp>
+    <ql/patterns/observable.hpp>
+    <ql/qldefines.hpp>
+    <ql/termstructure.hpp>)
+endif()
+
 target_compile_definitions(ql_library PRIVATE
     QL_COMPILATION)