From 9207f6540e848212d6fe2512edc3a52880cbcbc3 Mon Sep 17 00:00:00 2001
From: Christoph Junghans <junghans@lanl.gov>
Date: Mon, 28 Aug 2017 14:11:21 -0600
Subject: [PATCH] fix liblammps install

---
 cmake/CMakeLists.txt            |  7 ++++++-
 cmake/pkgconfig/liblammps.pc.in | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 cmake/pkgconfig/liblammps.pc.in

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 4296a040c8..d143f5bc2f 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -49,6 +49,7 @@ endif()
 include(GNUInstallDirs)
 
 set(LAMMPS_LINK_LIBS)
+set(LAMMPS_API_DEFINES)
 option(ENABLE_MPI "Build MPI version" OFF)
 if(ENABLE_MPI)
   find_package(MPI REQUIRED)
@@ -69,6 +70,7 @@ endif()
 set(LAMMPS_SIZE_LIMIT "LAMMPS_SMALLBIG" CACHE STRING "Lammps size limit")
 set_property(CACHE LAMMPS_SIZE_LIMIT PROPERTY STRINGS LAMMPS_SMALLBIG LAMMPS_BIGBIG LAMMPS_SMALLSMALL)
 add_definitions(-D${LAMMPS_SIZE_LIMIT})
+set(LAMMPS_API_DEFINES "${LAMMPS_API_DEFINES} -D${LAMMPS_SIZE_LIMIT}")
 
 set(LAMMPS_MEMALIGN "64" CACHE STRING "enables the use of the posix_memalign() call instead of malloc() when large chunks or memory are allocated by LAMMPS")
 add_definitions(-DLAMMPS_MEMALIGN=${LAMMPS_MEMALIGN})
@@ -76,6 +78,7 @@ add_definitions(-DLAMMPS_MEMALIGN=${LAMMPS_MEMALIGN})
 option(LAMMPS_EXCEPTIONS "enable the use of C++ exceptions for error messages (useful for library interface)" OFF)
 if(LAMMPS_EXCEPTIONS)
   add_definitions(-DLAMMPS_EXCEPTIONS)
+  set(LAMMPS_API_DEFINES "${LAMMPS_API_DEFINES -DLAMMPS_EXCEPTIONS")
 endif()
 
 option(CMAKE_VERBOSE_MAKEFILE "Verbose makefile" OFF)
@@ -578,7 +581,9 @@ target_link_libraries(lammps ${LAMMPS_LINK_LIBS})
 set_target_properties(lammps PROPERTIES SOVERSION ${SOVERSION})
 if(BUILD_SHARED_LIBS)
   install(TARGETS lammps LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-  install(FILES ${LAMMPS_SOURCE_DIR}/lammps.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+  install(FILES ${LAMMPS_SOURCE_DIR}/library.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/lammps)
+  configure_file(pkgconfig/liblammps.pc.in ${CMAKE_CURRENT_BINARY_DIR}/liblammps.pc @ONLY)
+  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/liblammps.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 endif()
 
 add_executable(lmp ${LMP_SOURCES})
diff --git a/cmake/pkgconfig/liblammps.pc.in b/cmake/pkgconfig/liblammps.pc.in
new file mode 100644
index 0000000000..643b4ba501
--- /dev/null
+++ b/cmake/pkgconfig/liblammps.pc.in
@@ -0,0 +1,18 @@
+# pkg-config file for lammps
+# https://people.freedesktop.org/~dbn/pkg-config-guide.html
+# Usage: cc `pkg-config --cflags --libs liblammps` -o myapp myapp.c
+# after you added @CMAKE_INSTALL_FULL_LIBDIR@/pkg-config to PKG_CONFIG_PATH,
+# e.g. export PKG_CONFIG_PATH=@CMAKE_INSTALL_FULL_LIBDIR@/pkgconfig
+
+prefix=@CMAKE_INSTALL_FULL_PREFIX@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+
+Name: liblammps
+Description: Large-scale Atomic/Molecular Massively Parallel Simulator Library
+URL: http://lammps.sandia.gov
+Version:
+Requires:
+Libs: -L${libdir} -llammps
+Libs.private: -lm
+Cflags: -I${includedir} @LAMMPS_API_DEFINES@