feat: init shared library support.

src/fpm.f90

@@ -12,12 +12,14 @@ module fpm
 use fpm_model, only: fpm_model_t, srcfile_t, show_model, fortran_features_t, &
                     FPM_SCOPE_UNKNOWN, FPM_SCOPE_LIB, FPM_SCOPE_DEP, &
                     FPM_SCOPE_APP, FPM_SCOPE_EXAMPLE, FPM_SCOPE_TEST
-use fpm_compiler, only: new_compiler, new_archiver, set_cpp_preprocessor_flags
+use fpm_compiler, only: new_compiler, new_archiver, set_cpp_preprocessor_flags, &
+                        generate_shared_library
 
 
 use fpm_sources, only: add_executable_sources, add_sources_from_dir
 use fpm_targets, only: targets_from_sources, build_target_t, build_target_ptr, &
-                        FPM_TARGET_EXECUTABLE, FPM_TARGET_ARCHIVE
+                        FPM_TARGET_EXECUTABLE, FPM_TARGET_ARCHIVE, &
+                        FPM_TARGET_OBJECT
 use fpm_manifest, only : get_package_data, package_config_t
 use fpm_meta, only : resolve_metapackages
 use fpm_error, only : error_t, fatal_error, fpm_stop
@@ -467,6 +469,12 @@ subroutine cmd_build(settings)
     call build_package(targets,model,verbose=settings%verbose)
 endif
 
+do i=1, size(targets)
+    if (targets(i)%ptr%target_type == FPM_TARGET_ARCHIVE .and. package%build%shared_library) then
+        call model%compiler%generate_shared_library(model%package_name, targets(i)%ptr%output_file)
+        exit
+    end if
+enddo
 end subroutine cmd_build
 
 subroutine cmd_run(settings,test)

src/fpm/manifest/build.f90

@@ -41,6 +41,9 @@ module fpm_manifest_build
         !> External modules to use
         type(string_t), allocatable :: external_modules(:)
 
+        !> Generate a shared library.
+        logical :: shared_library = .false.
+
     contains
 
         !> Print information on this instance
@@ -135,6 +138,8 @@ subroutine new_build_config(self, table, package_name, error)
         call get_list(table, "external-modules", self%external_modules, error)
         if (allocated(error)) return
 
+        call get_value(table, "shared-library", self%shared_library, .false., stat=stat)
+
     end subroutine new_build_config
 
     !> Check local schema for allowed entries
@@ -160,7 +165,7 @@ subroutine check(table, package_name, error)
         do ikey = 1, size(list)
             select case(list(ikey)%key)
 
-            case("auto-executables", "auto-examples", "auto-tests", "link", "external-modules", "module-naming")
+            case("auto-executables", "auto-examples", "auto-tests", "link", "external-modules", "module-naming", "shared-library")
                 continue
 
             case default
@@ -216,6 +221,8 @@ subroutine info(self, unit, verbosity)
             end do
         end if
 
+        write(unit, fmt) " - generate shared library ", merge("enabled ", "disabled", self%shared_library)
+
     end subroutine info
 
     !> Check that two dependency trees are equal
@@ -235,6 +242,7 @@ logical function build_conf_is_same(this,that)
              if (.not.this%module_prefix==other%module_prefix) return
              if (.not.this%link==other%link) return
              if (.not.this%external_modules==other%external_modules) return
+             if (this%shared_library.neqv.other%shared_library) return
 
          class default
             ! Not the same type
@@ -278,6 +286,8 @@ subroutine dump_to_toml(self, table, error)
         call set_list(table, "external-modules", self%external_modules, error)
         if (allocated(error)) return
 
+        call set_value(table, "shared-library", self%shared_library, error, class_name)
+
     end subroutine dump_to_toml
 
     !> Read build config from toml table (no checks made at this stage)
@@ -321,6 +331,8 @@ subroutine load_from_toml(self, table, error)
         call get_list(table, "external-modules", self%external_modules, error)
         if (allocated(error)) return
 
+        call get_value(table, "shared-library", self%shared_library, error, class_name)
+
     end subroutine load_from_toml
 
 

src/fpm/manifest/install.f90

@@ -118,6 +118,7 @@ logical function install_conf_same(this,that)
 
     install_conf_same = .false.
 
+
     select type (other=>that)
        type is (install_config_t)
           if (this%library.neqv.other%library) return

src/fpm_compiler.F90

@@ -46,6 +46,7 @@ module fpm_compiler
 implicit none
 public :: compiler_t, new_compiler, archiver_t, new_archiver, get_macros
 public :: debug
+public :: generate_shared_library
 
 enum, bind(C)
     enumerator :: &
@@ -114,6 +115,8 @@ module fpm_compiler
     procedure :: is_gnu
     !> Enumerate libraries, based on compiler and platform
     procedure :: enumerate_libraries
+    !> Function for generating shared library.
+    procedure :: generate_shared_library
 
     !> Serialization interface
     procedure :: serializable_is_same => compiler_is_same
@@ -1104,6 +1107,18 @@ subroutine compile_fortran(self, input, output, args, log_file, stat)
         & echo=self%echo, verbose=self%verbose, redirect=log_file, exitstat=stat)
 end subroutine compile_fortran
 
+subroutine generate_shared_library(self, package_name, output_file)
+    !> Instance of the compiler object
+    class(compiler_t), intent(in) :: self
+    !> Name of the package.
+    character(len=*), intent(in) :: package_name
+    !> Output file of library archive.
+    character(len=*), intent(in) :: output_file
+
+    call run(self%fc // " --shared " // " -o " // "lib" // package_name // ".so" // " " &
+        // output_file, echo=self%echo, verbose=self%verbose)
+end subroutine generate_shared_library
+
 
 !> Compile a C object
 subroutine compile_c(self, input, output, args, log_file, stat)