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fpm_targets.f90
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!># Build target handling
!>
!> This module handles the construction of the build target list
!> from the sources list (`[[targets_from_sources]]`), the
!> resolution of module-dependencies between build targets
!> (`[[resolve_module_dependencies]]`), and the enumeration of
!> objects required for link targets (`[[resolve_target_linking]]`).
!>
!> A build target (`[[build_target_t]]`) is a file to be generated
!> by the backend (compilation and linking).
!>
!> @note The current implementation is ignorant to the existence of
!> module files (`.mod`,`.smod`). Dependencies arising from modules
!> are based on the corresponding object files (`.o`) only.
!>
!> For more information, please read the documentation for the procedures:
!>
!> - `[[build_target_list]]`
!> - `[[resolve_module_dependencies]]`
!>
!>### Enumerations
!>
!> __Target type:__ `FPM_TARGET_*`
!> Describes the type of build target — determines backend build rules
!>
module fpm_targets
use iso_fortran_env, only: int64
use fpm_error, only: error_t, fatal_error, fpm_stop
use fpm_model
use fpm_compiler, only : compiler_t
use fpm_environment, only: get_os_type, OS_WINDOWS, OS_MACOS
use fpm_filesystem, only: dirname, join_path, canon_path
use fpm_strings, only: string_t, operator(.in.), string_cat, fnv_1a, resize, lower, str_ends_with
use fpm_compiler, only: get_macros
use fpm_sources, only: get_exe_name_with_suffix
use fpm_manifest_preprocess, only: preprocess_config_t
implicit none
private
public FPM_TARGET_UNKNOWN, FPM_TARGET_EXECUTABLE, &
FPM_TARGET_ARCHIVE, FPM_TARGET_OBJECT, &
FPM_TARGET_C_OBJECT, FPM_TARGET_CPP_OBJECT, &
FPM_TARGET_NAME
public build_target_t, build_target_ptr
public targets_from_sources, resolve_module_dependencies
public add_target, add_dependency
public filter_library_targets, filter_executable_targets, filter_modules
!> Target type is unknown (ignored)
integer, parameter :: FPM_TARGET_UNKNOWN = -1
!> Target type is executable
integer, parameter :: FPM_TARGET_EXECUTABLE = 1
!> Target type is library archive
integer, parameter :: FPM_TARGET_ARCHIVE = 2
!> Target type is compiled object
integer, parameter :: FPM_TARGET_OBJECT = 3
!> Target type is c compiled object
integer, parameter :: FPM_TARGET_C_OBJECT = 4
!> Target type is cpp compiled object
integer, parameter :: FPM_TARGET_CPP_OBJECT = 5
!> Wrapper type for constructing arrays of `[[build_target_t]]` pointers
type build_target_ptr
type(build_target_t), pointer :: ptr => null()
end type build_target_ptr
!> Type describing a generated build target
type build_target_t
!> File path of build target object relative to cwd
character(:), allocatable :: output_file
!> File path of build target object relative to output_dir
character(:), allocatable :: output_name
!> File path of output directory
character(:), allocatable :: output_dir
!> File path of build log file relative to cwd
character(:), allocatable :: output_log_file
!> Name of parent package
character(:), allocatable :: package_name
!> Primary source for this build target
type(srcfile_t), allocatable :: source
!> Resolved build dependencies
type(build_target_ptr), allocatable :: dependencies(:)
!> Target type
integer :: target_type = FPM_TARGET_UNKNOWN
!> Native libraries to link against
type(string_t), allocatable :: link_libraries(:)
!> Objects needed to link this target
type(string_t), allocatable :: link_objects(:)
!> Link flags for this build target
character(:), allocatable :: link_flags
!> Compile flags for this build target
character(:), allocatable :: compile_flags
!> Flag set when first visited to check for circular dependencies
logical :: touched = .false.
!> Flag set if build target is sorted for building
logical :: sorted = .false.
!> Flag set if build target will be skipped (not built)
logical :: skip = .false.
!> Language features
type(fortran_features_t) :: features
!> Targets in the same schedule group are guaranteed to be independent
integer :: schedule = -1
!> Previous source file hash
integer(int64), allocatable :: digest_cached
!> List of macros
type(string_t), allocatable :: macros(:)
!> Version number
character(:), allocatable :: version
contains
procedure :: is_executable_target
end type build_target_t
contains
!> Target type name
pure function FPM_TARGET_NAME(type) result(msg)
integer, intent(in) :: type
character(:), allocatable :: msg
select case (type)
case (FPM_TARGET_ARCHIVE); msg = 'Archive'
case (FPM_TARGET_CPP_OBJECT); msg = 'C++ object'
case (FPM_TARGET_C_OBJECT); msg = 'C Object'
case (FPM_TARGET_EXECUTABLE); msg = 'Executable'
case (FPM_TARGET_OBJECT); msg = 'Object'
case default; msg = 'Unknown'
end select
end function FPM_TARGET_NAME
!> High-level wrapper to generate build target information
subroutine targets_from_sources(targets,model,prune,error)
!> The generated list of build targets
type(build_target_ptr), intent(out), allocatable :: targets(:)
!> The package model from which to construct the target list
type(fpm_model_t), intent(inout), target :: model
!> Enable tree-shaking/pruning of module dependencies
logical, intent(in) :: prune
!> Error structure
type(error_t), intent(out), allocatable :: error
call build_target_list(targets,model)
call collect_exe_link_dependencies(targets)
call resolve_module_dependencies(targets,model%external_modules,error)
if (allocated(error)) return
if (prune) then
call prune_build_targets(targets,root_package=model%package_name)
end if
call resolve_target_linking(targets,model)
end subroutine targets_from_sources
!> Constructs a list of build targets from a list of source files
!>
!>### Source-target mapping
!>
!> One compiled object target (`FPM_TARGET_OBJECT`) is generated for each
!> non-executable source file (`FPM_UNIT_MODULE`,`FPM_UNIT_SUBMODULE`,
!> `FPM_UNIT_SUBPROGRAM`,`FPM_UNIT_CSOURCE`).
!>
!> If any source file has scope `FPM_SCOPE_LIB` (*i.e.* there are library sources)
!> then the first target in the target list will be a library archive target
!> (`FPM_TARGET_ARCHIVE`). The archive target will have a dependency on every
!> compiled object target corresponding to a library source file.
!>
!> One compiled object target (`FPM_TARGET_OBJECT`) and one executable target (`FPM_TARGET_EXECUTABLE`) is
!> generated for each exectuable source file (`FPM_UNIT_PROGRAM`). The exectuble target
!> always has a dependency on the corresponding compiled object target. If there
!> is a library, then the executable target has an additional dependency on the library
!> archive target.
!>
subroutine build_target_list(targets,model)
!> The generated list of build targets
type(build_target_ptr), intent(out), allocatable :: targets(:)
!> The package model from which to construct the target list
type(fpm_model_t), intent(inout), target :: model
integer :: i, j, n_source, exe_type
character(:), allocatable :: exe_dir, compile_flags
logical :: with_lib
! Initialize targets
allocate(targets(0))
! Check for empty build (e.g. header-only lib)
n_source = sum([(size(model%packages(j)%sources), &
j=1,size(model%packages))])
if (n_source < 1) return
with_lib = any([((model%packages(j)%sources(i)%unit_scope == FPM_SCOPE_LIB, &
i=1,size(model%packages(j)%sources)), &
j=1,size(model%packages))])
if (with_lib) call add_target(targets,package=model%package_name,type = FPM_TARGET_ARCHIVE,&
output_name = join_path(&
model%package_name,'lib'//model%package_name//'.a'))
do j=1,size(model%packages)
associate(sources=>model%packages(j)%sources)
do i=1,size(sources)
if (.not. model%include_tests) then
if (sources(i)%unit_scope == FPM_SCOPE_TEST) cycle
end if
select case (sources(i)%unit_type)
case (FPM_UNIT_MODULE,FPM_UNIT_SUBMODULE,FPM_UNIT_SUBPROGRAM,FPM_UNIT_CSOURCE)
call add_target(targets,package=model%packages(j)%name,source = sources(i), &
type = merge(FPM_TARGET_C_OBJECT,FPM_TARGET_OBJECT,&
sources(i)%unit_type==FPM_UNIT_CSOURCE), &
output_name = get_object_name(sources(i)), &
features = model%packages(j)%features, &
preprocess = model%packages(j)%preprocess, &
version = model%packages(j)%version)
if (with_lib .and. sources(i)%unit_scope == FPM_SCOPE_LIB) then
! Archive depends on object
call add_dependency(targets(1)%ptr, targets(size(targets))%ptr)
end if
case (FPM_UNIT_CPPSOURCE)
call add_target(targets,package=model%packages(j)%name,source = sources(i), &
type = FPM_TARGET_CPP_OBJECT, &
output_name = get_object_name(sources(i)), &
preprocess = model%packages(j)%preprocess, &
version = model%packages(j)%version)
if (with_lib .and. sources(i)%unit_scope == FPM_SCOPE_LIB) then
! Archive depends on object
call add_dependency(targets(1)%ptr, targets(size(targets))%ptr)
end if
!> Add stdc++ as a linker flag. If not already there.
if (.not. ("stdc++" .in. model%link_libraries)) then
if (get_os_type() == OS_MACOS) then
model%link_libraries = [model%link_libraries, string_t("c++")]
else
model%link_libraries = [model%link_libraries, string_t("stdc++")]
end if
end if
case (FPM_UNIT_PROGRAM)
if (str_ends_with(lower(sources(i)%file_name), [".c"])) then
exe_type = FPM_TARGET_C_OBJECT
else if (str_ends_with(lower(sources(i)%file_name), [".cpp", ".cc "])) then
exe_type = FPM_TARGET_CPP_OBJECT
else ! Default to a Fortran object
exe_type = FPM_TARGET_OBJECT
end if
call add_target(targets,package=model%packages(j)%name,type = exe_type,&
output_name = get_object_name(sources(i)), &
source = sources(i), &
features = model%packages(j)%features, &
preprocess = model%packages(j)%preprocess &
)
if (sources(i)%unit_scope == FPM_SCOPE_APP) then
exe_dir = 'app'
else if (sources(i)%unit_scope == FPM_SCOPE_EXAMPLE) then
exe_dir = 'example'
else
exe_dir = 'test'
end if
call add_target(targets,package=model%packages(j)%name,type = FPM_TARGET_EXECUTABLE,&
link_libraries = sources(i)%link_libraries, &
output_name = join_path(exe_dir,get_exe_name_with_suffix(sources(i))))
associate(target => targets(size(targets))%ptr)
! Linker-only flags are necessary on some compilers for codes with non-Fortran main
select case (exe_type)
case (FPM_TARGET_C_OBJECT)
call model%compiler%get_main_flags("c",compile_flags)
case (FPM_TARGET_CPP_OBJECT)
call model%compiler%get_main_flags("c++",compile_flags)
case default
compile_flags = ""
end select
target%compile_flags = target%compile_flags//' '//compile_flags
! Executable depends on object
call add_dependency(target, targets(size(targets)-1)%ptr)
if (with_lib) then
! Executable depends on library
call add_dependency(target, targets(1)%ptr)
end if
endassociate
end select
end do
end associate
end do
contains
function get_object_name(source) result(object_file)
! Generate object target path from source name and model params
!
!
type(srcfile_t), intent(in) :: source
character(:), allocatable :: object_file
integer :: i
character(1), parameter :: filesep = '/'
object_file = canon_path(source%file_name)
! Convert any remaining directory separators to underscores
i = index(object_file,filesep)
do while(i > 0)
object_file(i:i) = '_'
i = index(object_file,filesep)
end do
object_file = join_path(model%package_name,object_file)//'.o'
end function get_object_name
end subroutine build_target_list
!> Add non-library non-module dependencies for executable targets
!>
!> Executable targets will link to any non-program non-module source files that
!> are in the same directory or in a subdirectory.
!>
!> (Note: Fortran module dependencies are handled separately in
!> `resolve_module_dependencies` and `resolve_target_linking`.)
!>
subroutine collect_exe_link_dependencies(targets)
type(build_target_ptr), intent(inout) :: targets(:)
integer :: i, j
character(:), allocatable :: exe_source_dir
! Add non-module dependencies for executables
do j=1,size(targets)
if (targets(j)%ptr%target_type == FPM_TARGET_EXECUTABLE) then
do i=1,size(targets)
if (i == j) cycle
associate(exe => targets(j)%ptr, dep => targets(i)%ptr)
exe_source_dir = dirname(exe%dependencies(1)%ptr%source%file_name)
if (allocated(dep%source)) then
if (dep%source%unit_scope /= FPM_SCOPE_LIB .and. &
dep%source%unit_type /= FPM_UNIT_PROGRAM .and. &
dep%source%unit_type /= FPM_UNIT_MODULE .and. &
index(dirname(dep%source%file_name), exe_source_dir) == 1) then
call add_dependency(exe, dep)
end if
end if
end associate
end do
end if
end do
end subroutine collect_exe_link_dependencies
!> Allocate a new target and append to target list
subroutine add_target(targets, package, type, output_name, source, link_libraries, &
& features, preprocess, version)
type(build_target_ptr), allocatable, intent(inout) :: targets(:)
character(*), intent(in) :: package
integer, intent(in) :: type
character(*), intent(in) :: output_name
type(srcfile_t), intent(in), optional :: source
type(string_t), intent(in), optional :: link_libraries(:)
type(fortran_features_t), intent(in), optional :: features
type(preprocess_config_t), intent(in), optional :: preprocess
character(*), intent(in), optional :: version
integer :: i
type(build_target_t), pointer :: new_target
if (.not.allocated(targets)) allocate(targets(0))
! Check for duplicate outputs
do i=1,size(targets)
if (targets(i)%ptr%output_name == output_name) then
write(*,*) 'Error while building target list: duplicate output object "',&
output_name,'"'
if (present(source)) write(*,*) ' Source file: "',source%file_name,'"'
call fpm_stop(1,' ')
end if
end do
allocate(new_target)
new_target%target_type = type
new_target%output_name = output_name
new_target%package_name = package
if (present(source)) new_target%source = source
if (present(link_libraries)) new_target%link_libraries = link_libraries
if (present(features)) new_target%features = features
if (present(preprocess)) then
if (allocated(preprocess%macros)) new_target%macros = preprocess%macros
endif
if (present(version)) new_target%version = version
allocate(new_target%dependencies(0))
targets = [targets, build_target_ptr(new_target)]
end subroutine add_target
!> Add pointer to dependeny in target%dependencies
subroutine add_dependency(target, dependency)
type(build_target_t), intent(inout) :: target
type(build_target_t) , intent(in), target :: dependency
target%dependencies = [target%dependencies, build_target_ptr(dependency)]
end subroutine add_dependency
!> Add dependencies to source-based targets (`FPM_TARGET_OBJECT`)
!> based on any modules used by the corresponding source file.
!>
!>### Source file scoping
!>
!> Source files are assigned a scope of either `FPM_SCOPE_LIB`,
!> `FPM_SCOPE_APP` or `FPM_SCOPE_TEST`. The scope controls which
!> modules may be used by the source file:
!>
!> - Library sources (`FPM_SCOPE_LIB`) may only use modules
!> also with library scope. This includes library modules
!> from dependencies.
!>
!> - Executable sources (`FPM_SCOPE_APP`,`FPM_SCOPE_TEST`) may use
!> library modules (including dependencies) as well as any modules
!> corresponding to source files in the same directory or a
!> subdirectory of the executable source file.
!>
!> @warning If a module used by a source file cannot be resolved to
!> a source file in the package of the correct scope, then a __fatal error__
!> is returned by the procedure and model construction fails.
!>
subroutine resolve_module_dependencies(targets,external_modules,error)
type(build_target_ptr), intent(inout), target :: targets(:)
type(string_t), intent(in) :: external_modules(:)
type(error_t), allocatable, intent(out) :: error
type(build_target_ptr) :: dep
integer :: i, j
do i=1,size(targets)
if (.not.allocated(targets(i)%ptr%source)) cycle
do j=1,size(targets(i)%ptr%source%modules_used)
if (targets(i)%ptr%source%modules_used(j)%s .in. targets(i)%ptr%source%modules_provided) then
! Dependency satisfied in same file, skip
cycle
end if
if (targets(i)%ptr%source%modules_used(j)%s .in. external_modules) then
! Dependency satisfied in system-installed module
cycle
end if
if (any(targets(i)%ptr%source%unit_scope == &
[FPM_SCOPE_APP, FPM_SCOPE_EXAMPLE, FPM_SCOPE_TEST])) then
dep%ptr => &
find_module_dependency(targets,targets(i)%ptr%source%modules_used(j)%s, &
include_dir = dirname(targets(i)%ptr%source%file_name))
else
dep%ptr => &
find_module_dependency(targets,targets(i)%ptr%source%modules_used(j)%s)
end if
if (.not.associated(dep%ptr)) then
call fatal_error(error, &
'Unable to find source for module dependency: "' // &
targets(i)%ptr%source%modules_used(j)%s // &
'" used by "'//targets(i)%ptr%source%file_name//'"')
return
end if
call add_dependency(targets(i)%ptr, dep%ptr)
end do
end do
end subroutine resolve_module_dependencies
function find_module_dependency(targets,module_name,include_dir) result(target_ptr)
! Find a module dependency in the library or a dependency library
!
! 'include_dir' specifies an allowable non-library search directory
! (Used for executable dependencies)
!
type(build_target_ptr), intent(in), target :: targets(:)
character(*), intent(in) :: module_name
character(*), intent(in), optional :: include_dir
type(build_target_t), pointer :: target_ptr
integer :: k, l
target_ptr => NULL()
do k=1,size(targets)
if (.not.allocated(targets(k)%ptr%source)) cycle
do l=1,size(targets(k)%ptr%source%modules_provided)
if (module_name == targets(k)%ptr%source%modules_provided(l)%s) then
select case(targets(k)%ptr%source%unit_scope)
case (FPM_SCOPE_LIB, FPM_SCOPE_DEP)
target_ptr => targets(k)%ptr
exit
case default
if (present(include_dir)) then
if (index(dirname(targets(k)%ptr%source%file_name), include_dir) == 1) then ! source file is within the include_dir or a subdirectory
target_ptr => targets(k)%ptr
exit
end if
end if
end select
end if
end do
end do
end function find_module_dependency
!> Perform tree-shaking to remove unused module targets
subroutine prune_build_targets(targets, root_package)
!> Build target list to prune
type(build_target_ptr), intent(inout), allocatable :: targets(:)
!> Name of root package
character(*), intent(in) :: root_package
integer :: i, j, nexec
type(string_t), allocatable :: modules_used(:)
logical :: exclude_target(size(targets))
logical, allocatable :: exclude_from_archive(:)
if (size(targets) < 1) then
return
end if
nexec = 0
allocate(modules_used(0))
! Enumerate modules used by executables, non-module subprograms and their dependencies
do i=1,size(targets)
if (targets(i)%ptr%target_type == FPM_TARGET_EXECUTABLE) then
nexec = nexec + 1
call collect_used_modules(targets(i)%ptr)
elseif (allocated(targets(i)%ptr%source)) then
if (targets(i)%ptr%source%unit_type == FPM_UNIT_SUBPROGRAM) then
call collect_used_modules(targets(i)%ptr)
end if
end if
end do
! If there aren't any executables, then prune
! based on modules used in root package
if (nexec < 1) then
do i=1,size(targets)
if (targets(i)%ptr%package_name == root_package .and. &
targets(i)%ptr%target_type /= FPM_TARGET_ARCHIVE) then
call collect_used_modules(targets(i)%ptr)
end if
end do
end if
call reset_target_flags(targets)
exclude_target(:) = .false.
! Exclude purely module targets if they are not used anywhere
do i=1,size(targets)
associate(target=>targets(i)%ptr)
if (allocated(target%source)) then
if (target%source%unit_type == FPM_UNIT_MODULE) then
exclude_target(i) = .true.
target%skip = .true.
do j=1,size(target%source%modules_provided)
if (target%source%modules_provided(j)%s .in. modules_used) then
exclude_target(i) = .false.
target%skip = .false.
end if
end do
elseif (target%source%unit_type == FPM_UNIT_SUBMODULE) then
! Remove submodules if their parents are not used
exclude_target(i) = .true.
target%skip = .true.
do j=1,size(target%source%parent_modules)
if (target%source%parent_modules(j)%s .in. modules_used) then
exclude_target(i) = .false.
target%skip = .false.
end if
end do
end if
end if
! (If there aren't any executables then we only prune modules from dependencies)
if (nexec < 1 .and. target%package_name == root_package) then
exclude_target(i) = .false.
target%skip = .false.
end if
end associate
end do
targets = pack(targets,.not.exclude_target)
! Remove unused targets from archive dependency list
if (targets(1)%ptr%target_type == FPM_TARGET_ARCHIVE) then
associate(archive=>targets(1)%ptr)
allocate(exclude_from_archive(size(archive%dependencies)))
exclude_from_archive(:) = .false.
do i=1,size(archive%dependencies)
if (archive%dependencies(i)%ptr%skip) then
exclude_from_archive(i) = .true.
end if
end do
archive%dependencies = pack(archive%dependencies,.not.exclude_from_archive)
end associate
end if
contains
!> Recursively collect which modules are actually used
recursive subroutine collect_used_modules(target)
type(build_target_t), intent(inout) :: target
integer :: j, k
if (target%touched) then
return
else
target%touched = .true.
end if
if (allocated(target%source)) then
! Add modules from this target and from any of it's children submodules
do j=1,size(target%source%modules_provided)
if (.not.(target%source%modules_provided(j)%s .in. modules_used)) then
modules_used = [modules_used, target%source%modules_provided(j)]
end if
! Recurse into child submodules
do k=1,size(targets)
if (allocated(targets(k)%ptr%source)) then
if (targets(k)%ptr%source%unit_type == FPM_UNIT_SUBMODULE) then
if (target%source%modules_provided(j)%s .in. targets(k)%ptr%source%parent_modules) then
call collect_used_modules(targets(k)%ptr)
end if
end if
end if
end do
end do
end if
! Recurse into dependencies
do j=1,size(target%dependencies)
if (target%dependencies(j)%ptr%target_type /= FPM_TARGET_ARCHIVE) then
call collect_used_modules(target%dependencies(j)%ptr)
end if
end do
end subroutine collect_used_modules
!> Reset target flags after recursive search
subroutine reset_target_flags(targets)
type(build_target_ptr), intent(inout) :: targets(:)
integer :: i
do i=1,size(targets)
targets(i)%ptr%touched = .false.
end do
end subroutine reset_target_flags
end subroutine prune_build_targets
!> Construct the linker flags string for each target
!> `target%link_flags` includes non-library objects and library flags
!>
subroutine resolve_target_linking(targets, model)
type(build_target_ptr), intent(inout), target :: targets(:)
type(fpm_model_t), intent(in) :: model
integer :: i
character(:), allocatable :: global_link_flags, local_link_flags
character(:), allocatable :: global_include_flags
if (size(targets) == 0) return
global_link_flags = ""
if (allocated(model%link_libraries)) then
if (size(model%link_libraries) > 0) then
global_link_flags = model%compiler%enumerate_libraries(global_link_flags, model%link_libraries)
end if
end if
allocate(character(0) :: global_include_flags)
if (allocated(model%include_dirs)) then
if (size(model%include_dirs) > 0) then
global_include_flags = global_include_flags // &
& " -I" // string_cat(model%include_dirs," -I")
end if
end if
do i=1,size(targets)
associate(target => targets(i)%ptr)
! If the main program is a C/C++ one, some compilers require additional linking flags, see
! https://stackoverflow.com/questions/36221612/p3dfft-compilation-ifort-compiler-error-multiple-definiton-of-main
! In this case, compile_flags were already allocated
if (.not.allocated(target%compile_flags)) allocate(character(len=0) :: target%compile_flags)
target%compile_flags = target%compile_flags//' '
select case (target%target_type)
case (FPM_TARGET_C_OBJECT)
target%compile_flags = target%compile_flags//model%c_compile_flags
case (FPM_TARGET_CPP_OBJECT)
target%compile_flags = target%compile_flags//model%cxx_compile_flags
case default
target%compile_flags = target%compile_flags//model%fortran_compile_flags &
& // get_feature_flags(model%compiler, target%features)
end select
!> Get macros as flags.
target%compile_flags = target%compile_flags // get_macros(model%compiler%id, &
target%macros, &
target%version)
if (len(global_include_flags) > 0) then
target%compile_flags = target%compile_flags//global_include_flags
end if
target%output_dir = get_output_dir(model%build_prefix, target%compile_flags)
target%output_file = join_path(target%output_dir, target%output_name)
target%output_log_file = join_path(target%output_dir, target%output_name)//'.log'
end associate
end do
call add_include_build_dirs(model, targets)
do i=1,size(targets)
associate(target => targets(i)%ptr)
allocate(target%link_objects(0))
if (target%target_type == FPM_TARGET_ARCHIVE) then
global_link_flags = target%output_file // global_link_flags
call get_link_objects(target%link_objects,target,is_exe=.false.)
allocate(character(0) :: target%link_flags)
else if (target%target_type == FPM_TARGET_EXECUTABLE) then
call get_link_objects(target%link_objects,target,is_exe=.true.)
local_link_flags = ""
if (allocated(model%link_flags)) local_link_flags = model%link_flags
target%link_flags = model%link_flags//" "//string_cat(target%link_objects," ")
if (allocated(target%link_libraries)) then
if (size(target%link_libraries) > 0) then
target%link_flags = model%compiler%enumerate_libraries(target%link_flags, target%link_libraries)
local_link_flags = model%compiler%enumerate_libraries(local_link_flags, target%link_libraries)
end if
end if
target%link_flags = target%link_flags//" "//global_link_flags
target%output_dir = get_output_dir(model%build_prefix, &
& target%compile_flags//local_link_flags)
target%output_file = join_path(target%output_dir, target%output_name)
target%output_log_file = join_path(target%output_dir, target%output_name)//'.log'
end if
end associate
end do
contains
!> Wrapper to build link object list
!>
!> For libraries: just list dependency objects of lib target
!>
!> For executables: need to recursively discover non-library
!> dependency objects. (i.e. modules in same dir as program)
!>
recursive subroutine get_link_objects(link_objects,target,is_exe)
type(string_t), intent(inout), allocatable :: link_objects(:)
type(build_target_t), intent(in) :: target
logical, intent(in) :: is_exe
integer :: i
type(string_t) :: temp_str
if (.not.allocated(target%dependencies)) return
do i=1,size(target%dependencies)
associate(dep => target%dependencies(i)%ptr)
if (.not.allocated(dep%source)) cycle
! Skip library dependencies for executable targets
! since the library archive will always be linked
if (is_exe.and.(dep%source%unit_scope == FPM_SCOPE_LIB)) cycle
! Skip if dependency object already listed
if (dep%output_file .in. link_objects) cycle
! Add dependency object file to link object list
temp_str%s = dep%output_file
link_objects = [link_objects, temp_str]
! For executable objects, also need to include non-library
! dependencies from dependencies (recurse)
if (is_exe) call get_link_objects(link_objects,dep,is_exe=.true.)
end associate
end do
end subroutine get_link_objects
end subroutine resolve_target_linking
subroutine add_include_build_dirs(model, targets)
type(fpm_model_t), intent(in) :: model
type(build_target_ptr), intent(inout), target :: targets(:)
integer :: i
type(string_t), allocatable :: build_dirs(:)
type(string_t) :: temp
allocate(build_dirs(0))
do i = 1, size(targets)
associate(target => targets(i)%ptr)
if (target%target_type /= FPM_TARGET_OBJECT) cycle
if (target%output_dir .in. build_dirs) cycle
temp%s = target%output_dir
build_dirs = [build_dirs, temp]
end associate
end do
do i = 1, size(targets)
associate(target => targets(i)%ptr)
if (target%target_type /= FPM_TARGET_OBJECT) cycle
target%compile_flags = target%compile_flags // &
" " // model%compiler%get_module_flag(target%output_dir) // &
" -I" // string_cat(build_dirs, " -I")
end associate
end do
end subroutine add_include_build_dirs
function get_output_dir(build_prefix, args) result(path)
character(len=*), intent(in) :: build_prefix