From fe37a1646df942fe9dc58f37e1394745523c2743 Mon Sep 17 00:00:00 2001
From: ridiculousfish <corydoras@ridiculousfish.com>
Date: Wed, 4 Oct 2017 20:31:35 -0700
Subject: [PATCH] Build pcre2 and muparser with CMake

This adds files MuParser.cmake and PCRE2.cmake. PCRE2 is built using
its own CMake path, while MuParser uses ExternalProject.
---
 CMakeFiles/MuParser.cmake | 28 ++++++++++++++++++++++++++++
 CMakeFiles/PCRE2.cmake    | 20 ++++++++++++++++++++
 CMakeLists.txt            | 11 +++++------
 3 files changed, 53 insertions(+), 6 deletions(-)
 create mode 100644 CMakeFiles/MuParser.cmake
 create mode 100644 CMakeFiles/PCRE2.cmake

diff --git a/CMakeFiles/MuParser.cmake b/CMakeFiles/MuParser.cmake
new file mode 100644
index 000000000..525181f6f
--- /dev/null
+++ b/CMakeFiles/MuParser.cmake
@@ -0,0 +1,28 @@
+INCLUDE(ExternalProject)
+
+SET(MUPARSER_PREFIX muparser-build)
+SET(MUPARSER_SRC ${CMAKE_CURRENT_SOURCE_DIR}/muparser-2.2.5)
+SET(MUPARSER_OBJ ${MUPARSER_PREFIX}/obj)
+SET(MUPARSER_DST ${MUPARSER_PREFIX}/dst)
+
+# MuParser configure has an obnoxious victory message which we suppress.
+EXTERNALPROJECT_ADD(
+  muparser_project
+  PREFIX ${MUPARSER_PREFIX}
+  SOURCE_DIR ${MUPARSER_SRC}
+  BINARY_DIR ${MUPARSER_OBJ}
+  INSTALL_DIR ${MUPARSER_DST}
+  CONFIGURE_COMMAND ${MUPARSER_SRC}/configure
+                    --prefix=${CMAKE_CURRENT_BINARY_DIR}/${MUPARSER_DST}
+                    --quiet --enable-shared=no --enable-samples=no --enable-debug=no > /dev/null
+  BUILD_COMMAND make -j 3 CPPFLAGS=-D_UNICODE=1\ -Wno-switch lib/libmuparser.a
+  INSTALL_COMMAND make install
+  BUILD_BYPRODUCTS ${MUPARSER_DST}/lib/libmuparser.a
+  EXCLUDE_FROM_ALL
+)
+
+ADD_LIBRARY(muparser STATIC IMPORTED)
+SET_TARGET_PROPERTIES(muparser PROPERTIES IMPORTED_LOCATION
+                      ${CMAKE_CURRENT_BINARY_DIR}/${MUPARSER_DST}/lib/libmuparser.a)
+ADD_DEPENDENCIES(muparser muparser_project)
+INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR}/${MUPARSER_DST}/include/)
diff --git a/CMakeFiles/PCRE2.cmake b/CMakeFiles/PCRE2.cmake
new file mode 100644
index 000000000..2b4afce25
--- /dev/null
+++ b/CMakeFiles/PCRE2.cmake
@@ -0,0 +1,20 @@
+# PCRE2 needs some settings.
+SET(PCRE2_WIDTH ${WCHAR_T_BITS})
+SET(PCRE2_BUILD_PCRE2_8 OFF CACHE BOOL "Build 8bit PCRE2 library")
+SET(PCRE2_BUILD_PCRE2_${PCRE2_WIDTH} ON CACHE BOOL "Build ${PCRE2_WIDTH}bit PCRE2 library")
+SET(PCRE2_SHOW_REPORT OFF CACHE BOOL "Show the final configuration report")
+SET(PCRE2_BUILD_PCRE2GREP OFF CACHE BOOL "Build pcre2grep")
+
+
+SET(PCRE2_MIN_VERSION 10.21)
+FIND_LIBRARY(PCRE2_LIB pcre2-${PCRE2_WIDTH})
+FIND_PATH(PCRE2_INCLUDE_DIR pcre2.h)
+IF (PCRE2_LIB AND PCRE2_INCLUDE_DIR)
+  MESSAGE(STATUS "Found system PCRE2 library ${PCRE2_INCLUDE_DIR}")
+ELSE()
+  MESSAGE(STATUS "Using bundled PCRE2 library")
+  ADD_SUBDIRECTORY(pcre2-10.22 EXCLUDE_FROM_ALL)
+  SET(PCRE2_INCLUDE_DIR ${CMAKE_BINARY_DIR}/pcre2-10.22/)
+  SET(PCRE2_LIB pcre2-${PCRE2_WIDTH})
+endif(PCRE2_LIB AND PCRE2_INCLUDE_DIR)
+INCLUDE_DIRECTORIES(${PCRE2_INCLUDE_DIR})
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 96e176b17..95a54ea6c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,17 +53,16 @@ ADD_DEFINITIONS(-D_UNICODE=1
                 -DBINDIR=L"${CMAKE_INSTALL_FULL_BINDIR}"
                 -DDOCDIR=L"${CMAKE_INSTALL_FULL_DOCDIR}")
 
-# Set up dependency paths.
-INCLUDE_DIRECTORIES(muparser-2.2.5/include/ pcre2-10.22/src/)
-LINK_DIRECTORIES(muparser-2.2.5/lib/ pcre2-10.22/.libs/)
+# Set up PCRE2
+INCLUDE(CMakeFiles/PCRE2.cmake)
 
-# PCRE2 needs a define.
-SET(PCRE2_WIDTH ${WCHAR_T_BITS})
+# Set up muparser.
+INCLUDE(CMakeFiles/MuParser.cmake)
 
 # Define a function to link dependencies.
 FUNCTION(FISH_LINK_DEPS target)
   TARGET_LINK_LIBRARIES(${target} ${CURSES_LIBRARIES} Threads::Threads)
-  TARGET_LINK_LIBRARIES(${target} pcre2-${PCRE2_WIDTH} muparser)
+  TARGET_LINK_LIBRARIES(${target} ${PCRE2_LIB} muparser)
 ENDFUNCTION(FISH_LINK_DEPS)
 
 # Define fish.