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local pkg_config_command = "pkg-config"
if os.getenv("PKG_CONFIG") then
pkg_config_command = os.getenv("PKG_CONFIG")
end
local pkg_config_path = ""
if os.getenv("PKG_CONFIG_PATH") then
pkg_config_path = os.getenv("PKG_CONFIG_PATH")
end
local static_link_libs = false
local function os_capture(cmd)
return io.popen(cmd, 'r'):read('*a'):gsub("\n", " ")
end
local function parse_pkg_config_includes(lib, alternative_cmd, alternative_flags)
local result
if not alternative_cmd then
result = os_capture("PKG_CONFIG_PATH=" .. pkg_config_path .. " " .. pkg_config_command .. " --cflags " .. lib)
else
if not alternative_flags then
result = os_capture(alternative_cmd.." --cflags")
else
result = os_capture(alternative_cmd.." "..alternative_flags)
end
end
-- Small trick: delete the space after -include so that we can detect
-- which files have to be force-included without difficulty.
result = result:gsub("%-include +(%g+)", "-include%1")
result = result:gsub("%-isystem +(%g+)", "-isystem%1")
local dirs = {}
local files = {}
local options = {}
for w in string.gmatch(result, "[^' ']+") do
if string.sub(w,1,2) == "-I" then
table.insert(dirs, string.sub(w,3))
elseif string.sub(w,1,8) == "-isystem" then
table.insert(dirs, string.sub(w,9))
elseif string.sub(w,1,8) == "-include" then
table.insert(files, string.sub(w,9))
else
table.insert(options, w)
end
end
return dirs, files, options
end
local function parse_pkg_config_links(lib, alternative_cmd, alternative_flags)
local result
if not alternative_cmd then
local static = static_link_libs and " --static " or ""
result = os_capture("PKG_CONFIG_PATH=" .. pkg_config_path .. " " .. pkg_config_command .. " --libs " .. static .. lib)
else
if not alternative_flags then
result = os_capture(alternative_cmd.." --libs")
else
result = os_capture(alternative_cmd.." "..alternative_flags)
end
end
-- On OSX, wx-config outputs "-framework foo" instead of "-Wl,-framework,foo"
-- which doesn't fare well with the splitting into libs, libdirs and options
-- we perform afterwards.
result = result:gsub("%-framework +(%g+)", "-Wl,-framework,%1")
local libs = {}
local dirs = {}
local options = {}
for w in string.gmatch(result, "[^' ']+") do
if string.sub(w,1,2) == "-l" then
table.insert(libs, string.sub(w,3))
elseif string.sub(w,1,2) == "-L" then
table.insert(dirs, string.sub(w,3))
else
table.insert(options, w)
end
end
return dirs, libs, options
end
-- ----------------------------------------------------------------------------
-- Public API
-- ----------------------------------------------------------------------------
local m = {}
m._VERSION = "2.0.0"
--- Append path to PKG_CONFIG_PATH
-- @param path string Path to append to PKG_CONFIG_PATH
function m.add_pkg_config_path(path)
if pkg_config_path == "" then
pkg_config_path = path
else
pkg_config_path = pkg_config_path .. ":" .. path
end
end
--- Set whether to link libraries statically.
-- @param value boolean True for static linking, false otherwise.
function m.set_static_link_libs(value)
static_link_libs = value
end
--- Add include directories and build options for a library.
-- @param lib string The library name.
-- @param alternative_cmd string|nil Optional alternative command.
-- @param alternative_flags string|nil Optional alternative flags.
function m.add_includes(lib, alternative_cmd, alternative_flags)
local dirs, files, options = parse_pkg_config_includes(lib, alternative_cmd, alternative_flags)
externalincludedirs(dirs)
forceincludes(files)
buildoptions(options)
end
--- Add include directories after the default ones (used for overrides).
-- @param lib string The library name.
-- @param alternative_cmd string|nil Optional alternative command.
-- @param alternative_flags string|nil Optional alternative flags.
function m.add_includes_after(lib, alternative_cmd, alternative_flags)
local dirs, files, options = parse_pkg_config_includes(lib, alternative_cmd, alternative_flags)
includedirsafter(dirs)
forceincludes(files)
buildoptions(options)
end
--- Add library directories, libraries, and link options for a library.
-- @param lib string The library name.
-- @param alternative_cmd string|nil Optional alternative command.
-- @param alternative_flags string|nil Optional alternative flags.
function m.add_links(lib, alternative_cmd, alternative_flags)
local dirs, libs, options = parse_pkg_config_links(lib, alternative_cmd, alternative_flags)
libdirs(dirs)
links(libs)
linkoptions(options)
end
return m
|
