[pangomm/use-dllexport-2-42] NMake Makefiles: Detect whether we can use __declspec(dllexport)

[Chun-wei Fan <fanchunwei src gnome org>]

commit d953162355e995d15e825843953c744d4872181e
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Mar 30 22:48:07 2020 +0800

    NMake Makefiles: Detect whether we can use __declspec(dllexport)
    
    The generated pangomm headers must be generated with a recent gmmproc so
    that we may ensure that all the needed classes, functions and methods
    are marked with PANGOMM_API, so that we can build pangomm without using
    gendef.exe.
    
    If the headers are generated with an older gmmproc, then we build
    pangomm using gendef.exe, as we did before.

 MSVC_NMake/build-rules-msvc.mak  |  6 +++---
 MSVC_NMake/create-lists-msvc.mak | 14 ++++++++++++++
 MSVC_NMake/filelist.am           |  1 +
 MSVC_NMake/get-gmmproc-ver.bat   | 34 ++++++++++++++++++++++++++++++++++
 4 files changed, 52 insertions(+), 3 deletions(-)
---
diff --git a/MSVC_NMake/build-rules-msvc.mak b/MSVC_NMake/build-rules-msvc.mak
index b49f588..3e7174b 100644
--- a/MSVC_NMake/build-rules-msvc.mak
+++ b/MSVC_NMake/build-rules-msvc.mak
@@ -30,7 +30,7 @@ $<
 
 {..\pango\src\}.ccg{vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm\}.obj:
        @if not exist $(@D)\private\ $(MAKE) /f Makefile.vc CFG=$(CFG) $(@D)\private
-       @for %%s in ($(<D)\*.ccg) do @if not exist ..\pango\pangomm\%%~ns.cc if not exist $(@D)\%%~ns.cc 
$(PERL) -- $(GMMPROC_DIR)/gmmproc -I ../tools/m4 --defs $(<D:\=/) %%~ns $(<D:\=/) $(@D)
+       @for %%s in ($(<D)\*.ccg) do @if not exist ..\pango\pangomm\%%~ns.cc if not exist 
..\untracked\pango\pangomm\%%~ns.cc if not exist $(@D)\%%~ns.cc $(PERL) -- $(GMMPROC_DIR)/gmmproc -I 
../tools/m4 --defs $(<D:\=/) %%~ns $(<D:\=/) $(@D)
        @if exist $(@D)\$(<B).cc $(CXX) $(PANGOMM_CFLAGS) $(CFLAGS_NOGL) /Fo$(@D)\ /Fd$(@D)\ /c $(@D)\$(<B).cc
        @if exist ..\pango\pangomm\$(<B).cc $(CXX) $(PANGOMM_CFLAGS) $(CFLAGS_NOGL) /Fo$(@D)\ /Fd$(@D)\ /c 
..\pango\pangomm\$(<B).cc
        @if exist ..\untracked\pango\pangomm\$(<B).cc $(CXX) $(PANGOMM_CFLAGS) $(CFLAGS_NOGL) /Fo$(@D)\ 
/Fd$(@D)\ /c ..\pango\pangomm\$(<B).cc
@@ -48,8 +48,8 @@ $(PANGOMM_LIB): $(PANGOMM_DLL)
 # $(dependent_objects)
 # <<
 #      @-if exist $@.manifest mt /manifest $@.manifest /outputresource:$@;2
-$(PANGOMM_DLL): vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm\pangomm.def $(pangomm_OBJS)
-       link /DLL $(LDFLAGS_NOLTCG) $(PANGO_LIBS) $(CAIROMM_LIB) $(GLIBMM_LIB) $(LIBSIGC_LIB) 
/implib:$(PANGOMM_LIB) /def:vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm\pangomm.def -out:$@ @<<
+$(PANGOMM_DLL): $(PANGOMM_INT_TARGET) $(pangomm_OBJS)
+       link /DLL $(LDFLAGS_NOLTCG) $(PANGO_LIBS) $(CAIROMM_LIB) $(GLIBMM_LIB) $(LIBSIGC_LIB) 
/implib:$(PANGOMM_LIB) $(PANGOMM_DEF_LDFLAG) -out:$@ @<<
 $(pangomm_OBJS)
 <<
        @-if exist $@.manifest mt /manifest $@.manifest /outputresource:$@;2
diff --git a/MSVC_NMake/create-lists-msvc.mak b/MSVC_NMake/create-lists-msvc.mak
index 8646f3b..7dbeba4 100644
--- a/MSVC_NMake/create-lists-msvc.mak
+++ b/MSVC_NMake/create-lists-msvc.mak
@@ -63,7 +63,21 @@ files_extra_ph_int = $(files_extra_ph:/=\)
 !if [call create-lists.bat footer pangomm.mak]
 !endif
 
+!if [for %f in (pangomm\attributes.h) do @if not exist ..\pango\%f if not exist ..\untracked\pango\%f if not 
exist vs$(PDBVER)\$(CFG)\$(PLAT)\%f (md vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm\private) & ($(PERL) -- 
$(GMMPROC_DIR)/gmmproc -I ../tools/m4 --defs ../pango/src attributes ../pango/src 
vs$(PDBVER)/$(CFG)/$(PLAT)/pangomm)]
+!endif
+
+!if [for %d in (vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm ..\pango\pangomm ..\untracked\pango\pangomm) do @if exist 
%d\attributes.h call get-gmmproc-ver %d\attributes.h>>pangomm.mak]
+!endif
+
 !include pangomm.mak
 
 !if [del /f /q pangomm.mak]
 !endif
+
+!if "$(GMMPROC_VER)" >= "2.64.0"
+PANGOMM_INT_TARGET = vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm
+PANGOMM_DEF_LDFLAG =
+!else
+PANGOMM_INT_TARGET = vs$(PDBVER)\$(CFG)\$(PLAT)\pangomm\pangomm.def
+PANGOMM_DEF_LDFLAG = /def:$(PANGOMM_INT_TARGET)
+!endif
diff --git a/MSVC_NMake/filelist.am b/MSVC_NMake/filelist.am
index 50aa019..647275a 100644
--- a/MSVC_NMake/filelist.am
+++ b/MSVC_NMake/filelist.am
@@ -9,6 +9,7 @@ msvc_nmake_data =               \
        gendef/gendef.cc        \
        gendef/meson.build      \
        generate-msvc.mak       \
+       get-gmmproc-ver.bat     \
        info-msvc.mak           \
        install.mak             \
        Makefile.vc             \
diff --git a/MSVC_NMake/get-gmmproc-ver.bat b/MSVC_NMake/get-gmmproc-ver.bat
new file mode 100644
index 0000000..f9b340f
--- /dev/null
+++ b/MSVC_NMake/get-gmmproc-ver.bat
@@ -0,0 +1,34 @@
+@echo off
+REM get-gmmproc-ver: Grab first line of a gmmproc-generated
+REM .h file to see which version of gmmproc is used to
+REM generate the header
+
+if "%1" == "" goto :usage
+
+call :print_first_line %1
+goto :eof
+
+:print_first_line
+setlocal EnableDelayedExpansion
+set /a line=0
+
+for /f ^"usebackq^ eol^=^ delims^=^" %%l in (%1) do (
+  if "!line!" == "1" goto :eof
+  echo %%l>tmp.txt
+  for /f "tokens=1-5" %%a in (tmp.txt) do (
+    if not "%%a" == "//" goto :not_gmmproc
+    if not "%%b" == "Generated" goto :not_gmmproc
+    if not "%%c" == "by" goto :not_gmmproc
+    if not "%%d" == "gmmproc" goto :not_gmmproc
+    echo GMMPROC_VER=%%e
+  )
+  del /f tmp.txt
+  set /a line+=1
+)
+
+:not_gmmproc
+echo This is not a gmmproc generated file.
+goto :eof
+
+:usage
+echo Usage: get-gmmproc-ver ^<generated-header^>
\ No newline at end of file