cmake_modules/FindCallOnceHack.cmake

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# CALLONCEHACK_ROOT hints the location
# Provides
#  - CALLONCEHACK_SHARED_LIB,
#  - CALLONCEHACK_INCLUDE_DIR,
#  - CALLONCEHACK_FOUND
set(_CALLONCEHACK_SEARCH_DIR)

if (CALLONCEHACK_ROOT)
set(_CALLONCEHACK_SEARCH_DIR PATHS ${CALLONCEHACK_ROOT} NO_DEFAULT_PATH)
endif()

find_path(CALLONCEHACK_INCLUDE_DIR calloncehack.h
  ${_CALLONCEHACK_SEARCH_DIR} PATH_SUFFIXES include)

# Calloncehack is always a shared library
find_library(CALLONCEHACK_SHARED_LIB libcalloncehack.so ${_CALLONCEHACK_SEARCH_DIR} PATH_SUFFIXES lib)

if (CALLONCEHACK_INCLUDE_DIR AND CALLONCEHACK_SHARED_LIB)
  set(CALLONCEHACK_FOUND TRUE)
  message(STATUS "Found the calloncehack library: ${CALLONCEHACK_SHARED_LIB}")
else()
  set(CALLONCEHACK_FOUND FALSE)
  message(FATAL_ERROR "calloncehack not found in ${CALLONCEHACK_ROOT}")
endif()

mark_as_advanced(
  CALLONCEHACK_INCLUDE_DIR
  CALLONCEHACK_SHARED_LIB
)