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cmake: Add GGML_BACKEND_DIR option (#15074)

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* cmake: Add GGML_BACKEND_DIR option

This can be used by distributions to specify where to look for backends
when ggml is built with GGML_BACKEND_DL=ON.

* Fix phrasing
This commit is contained in:
Christian Kastner
2025-08-04 21:29:14 +02:00
committed by GitHub
parent e5bebe5251
commit 41613437ff
4 changed files with 19 additions and 4 deletions
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5
ggml/CMakeLists.txt
View File

@@ -39,8 +39,9 @@ if (WIN32)
set(CMAKE_SHARED_MODULE_PREFIX "")
endif()
option(BUILD_SHARED_LIBS "ggml: build shared libraries" ${BUILD_SHARED_LIBS_DEFAULT})
option(GGML_BACKEND_DL "ggml: build backends as dynamic libraries (requires BUILD_SHARED_LIBS)" OFF)
option(BUILD_SHARED_LIBS "ggml: build shared libraries" ${BUILD_SHARED_LIBS_DEFAULT})
option(GGML_BACKEND_DL "ggml: build backends as dynamic libraries (requires BUILD_SHARED_LIBS)" OFF)
set(GGML_BACKEND_DIR "" CACHE PATH "ggml: directory to load dynamic backends from (requires GGML_BACKEND_DL")
#
# option list

2
ggml/cmake/ggml-config.cmake.in
View File

@@ -106,7 +106,7 @@ if(NOT TARGET ggml::ggml)
find_library(GGML_LIBRARY ggml
REQUIRED
HINTS ${GGML_LIB_DIR}
HINTS ${GGML_LIB_DIR} ${GGML_BACKEND_DIR}
NO_CMAKE_FIND_ROOT_PATH)
add_library(ggml::ggml UNKNOWN IMPORTED)

13
ggml/src/CMakeLists.txt
View File

@@ -214,6 +214,13 @@ add_library(ggml
ggml-backend-reg.cpp)
add_library(ggml::ggml ALIAS ggml)
if (GGML_BACKEND_DIR)
if (NOT GGML_BACKEND_DL)
message(FATAL_ERROR "GGML_BACKEND_DIR requires GGML_BACKEND_DL")
endif()
target_compile_definitions(ggml PUBLIC GGML_BACKEND_DIR="${GGML_BACKEND_DIR}")
endif()
target_link_libraries(ggml PUBLIC ggml-base)
if (CMAKE_SYSTEM_NAME MATCHES "Linux")
@@ -227,7 +234,11 @@ function(ggml_add_backend_library backend)
set_target_properties(${backend} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
target_compile_definitions(${backend} PRIVATE GGML_BACKEND_DL)
add_dependencies(ggml ${backend})
install(TARGETS ${backend} LIBRARY DESTINATION ${CMAKE_INSTALL_BINDIR})
if (GGML_BACKEND_DIR)
install(TARGETS ${backend} LIBRARY DESTINATION ${GGML_BACKEND_DIR})
else()
install(TARGETS ${backend} LIBRARY DESTINATION ${CMAKE_INSTALL_BINDIR})
endif()
else()
add_library(${backend} ${ARGN})
target_link_libraries(ggml PUBLIC ${backend})

3
ggml/src/ggml-backend-reg.cpp
View File

@@ -498,6 +498,9 @@ static ggml_backend_reg_t ggml_backend_load_best(const char * name, bool silent,
std::vector<fs::path> search_paths;
if (user_search_path == nullptr) {
#ifdef GGML_BACKEND_DIR
search_paths.push_back(fs::u8path(GGML_BACKEND_DIR));
#endif
// default search paths: executable directory, current directory
search_paths.push_back(get_executable_path());
search_paths.push_back(fs::current_path());