meson: ecpg: Split definition of static and shared libraries

Required for correct resource file generation, as the resource files should
only be added to the shared library.

This also fixes a bunch of issues in the .pc files.

Previously I tried to avoid building sources twice, once for the static and
once for the shared libraries. We could still do so, but it's not clear that
it's worth the complication.

Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/20220927011951.j3h4o7n6bhf7dwau@awork3.anarazel.de

src/interfaces/ecpg/compatlib/meson.build

@@ -1,11 +1,29 @@
-export_file = custom_target('libpq.exports', kwargs: gen_export_kwargs)
-
-ecpg_compat = both_libraries('libecpg_compat',
+ecpg_compat_sources = files(
   'informix.c',
-  include_directories: ['.', ecpg_inc, postgres_inc, libpq_inc],
-  c_args: ['-DSO_MAJOR_VERSION=3'],
-  dependencies: [frontend_code, thread_dep],
-  link_with: [ecpglib, ecpg_pgtypes],
+)
+ecpg_compat_so_sources = [] # for shared lib, in addition to the above
+
+ecpg_compat_inc = [include_directories('.'), ecpg_inc, libpq_inc]
+ecpg_compat_c_args = ['-DSO_MAJOR_VERSION=3']
+export_file = custom_target('libecpg_compat.exports', kwargs: gen_export_kwargs)
+
+# see src/interfaces/libpq/meson.build
+ecpg_compat_st = static_library('libecpg_compat',
+  ecpg_compat_sources,
+  include_directories: ecpg_compat_inc,
+  c_args: ecpg_compat_c_args,
+  dependencies: [frontend_stlib_code, thread_dep],
+  link_with: [ecpglib_st, ecpg_pgtypes_st],
+  kwargs: default_lib_args,
+)
+ecpg_targets += ecpg_compat_st
+
+ecpg_compat_so = shared_library('libecpg_compat',
+  ecpg_compat_sources + ecpg_compat_so_sources,
+  include_directories: ecpg_compat_inc,
+  c_args: ecpg_compat_c_args,
+  dependencies: [frontend_shlib_code, thread_dep],
+  link_with: [ecpglib_so, ecpg_pgtypes_so],
   soversion: host_system != 'windows' ? '3' : '',
   darwin_versions: ['3', '3.' + pg_version_major.to_string()],
   version: '3.' + pg_version_major.to_string(),
@@ -13,10 +31,13 @@ ecpg_compat = both_libraries('libecpg_compat',
   link_depends: export_file,
   kwargs: default_lib_args,
 )
-ecpg_targets += [ecpg_compat.get_shared_lib(), ecpg_compat.get_static_lib()]
+ecpg_targets += ecpg_compat_so
 
 pkgconfig.generate(
-  ecpg_compat.get_shared_lib(),
+  name: 'libecpg_compat',
   description: 'PostgreSQL libecpg_compat library',
   url: pg_url,
+  libraries: ecpg_compat_so,
+  libraries_private: [frontend_stlib_code, thread_dep],
+  requires_private: ['libecpg', 'libpgtypes'],
 )

src/interfaces/ecpg/ecpglib/meson.build

@@ -10,15 +10,29 @@ ecpglib_sources = files(
   'sqlda.c',
   'typename.c',
 )
+ecpglib_so_sources = [] # for shared lib, in addition to the above
 
-export_file = custom_target('libpq.exports', kwargs: gen_export_kwargs)
+ecpglib_inc = [include_directories('.'), ecpg_inc]
+ecpglib_c_args = ['-DSO_MAJOR_VERSION=6']
+export_file = custom_target('libecpg.exports', kwargs: gen_export_kwargs)
 
-ecpglib = both_libraries('libecpg',
+# see src/interfaces/libpq/meson.build
+ecpglib_st = static_library('libecpg',
   ecpglib_sources,
-  include_directories: ['.', ecpg_inc, postgres_inc],
-  c_args: ['-DSO_MAJOR_VERSION=6'],
-  dependencies: [frontend_code, libpq, thread_dep],
-  link_with: [ecpg_pgtypes],
+  include_directories: ecpglib_inc,
+  c_args: ecpglib_c_args,
+  dependencies: [frontend_stlib_code, thread_dep, libpq],
+  link_with: [ecpg_pgtypes_st],
+  kwargs: default_lib_args,
+)
+ecpg_targets += ecpglib_st
+
+ecpglib_so = shared_library('libecpg',
+  ecpglib_sources + ecpglib_so_sources,
+  include_directories: ecpglib_inc,
+  c_args: ecpglib_c_args,
+  dependencies: [frontend_shlib_code, libpq, thread_dep],
+  link_with: ecpg_pgtypes_so,
   soversion: host_system != 'windows' ? '6' : '',
   darwin_versions: ['6', '6.' + pg_version_major.to_string()],
   version: '6.' + pg_version_major.to_string(),
@@ -26,12 +40,15 @@ ecpglib = both_libraries('libecpg',
   link_depends: export_file,
   kwargs: default_lib_args,
 )
-ecpg_targets += [ecpglib.get_shared_lib(), ecpglib.get_static_lib()]
+ecpg_targets += ecpglib_so
 
 pkgconfig.generate(
-  ecpglib.get_shared_lib(),
+  name: 'libecpg',
   description: 'PostgreSQL libecpg library',
   url: pg_url,
+  libraries: ecpglib_so,
+  libraries_private: [frontend_shlib_code, thread_dep],
+  requires_private: ['libpgtypes', 'libpq'],
 )
 
 subdir('po', if_found: libintl)

src/interfaces/ecpg/pgtypeslib/meson.build

@@ -6,14 +6,27 @@ ecpg_pgtypes_sources = files(
   'numeric.c',
   'timestamp.c',
 )
+ecpg_pgtypes_so_sources = [] # for shared lib, in addition to the above
 
-export_file = custom_target('libpq.exports', kwargs: gen_export_kwargs)
+export_file = custom_target('libpgtypes.exports', kwargs: gen_export_kwargs)
+ecpg_pgtypes_inc = [include_directories('.'), ecpg_inc]
+ecpg_pgtypes_c_args = ['-DSO_MAJOR_VERSION=3']
 
-ecpg_pgtypes = both_libraries('libpgtypes',
+# see src/interfaces/libpq/meson.build
+ecpg_pgtypes_st = static_library('libpgtypes',
   ecpg_pgtypes_sources,
-  include_directories: ['.', ecpg_inc, postgres_inc],
-  c_args: ['-DSO_MAJOR_VERSION=3'],
-  dependencies: [frontend_code],
+  include_directories: ecpg_pgtypes_inc,
+  c_args: ecpg_pgtypes_c_args,
+  dependencies: frontend_stlib_code,
+  kwargs: default_lib_args,
+)
+ecpg_targets += ecpg_pgtypes_st
+
+ecpg_pgtypes_so = shared_library('libpgtypes',
+  ecpg_pgtypes_sources + ecpg_pgtypes_so_sources,
+  include_directories: ecpg_pgtypes_inc,
+  c_args: ecpg_pgtypes_c_args,
+  dependencies: frontend_shlib_code,
   version: '3.' + pg_version_major.to_string(),
   soversion: host_system != 'windows' ? '3' : '',
   darwin_versions: ['3', '3.' + pg_version_major.to_string()],
@@ -21,10 +34,12 @@ ecpg_pgtypes = both_libraries('libpgtypes',
   link_depends: export_file,
   kwargs: default_lib_args,
 )
-ecpg_targets += [ecpg_pgtypes.get_shared_lib(), ecpg_pgtypes.get_static_lib()]
+ecpg_targets += ecpg_pgtypes_so
 
 pkgconfig.generate(
-  ecpg_pgtypes.get_shared_lib(),
+  name: 'libpgtypes',
   description: 'PostgreSQL libpgtypes library',
   url: pg_url,
+  libraries: ecpg_pgtypes_so,
+  libraries_private: [frontend_stlib_code],
 )

src/interfaces/ecpg/test/meson.build

@@ -22,7 +22,7 @@ testprep_targets += pg_regress_ecpg
 ecpg_test_exec_kw = {
   'dependencies': [frontend_code, libpq],
   'include_directories': [ecpg_inc],
-  'link_with': [ecpglib, ecpg_compat, ecpg_pgtypes],
+  'link_with': [ecpglib_so, ecpg_compat_so, ecpg_pgtypes_so],
   'build_by_default': false,
   'install': false,
 }