use .gch only for gcc's PCH files

It a) looked a bit silly to use .gch even with MSVC, b) allows to build
something with Clang and GCC without them trying to use each other's PCH
file, c) is nitpicking, yeah.

Change-Id: I478beeb6aab6378cbdcc6ea75aa2e3ff2bcf6f87
Reviewed-on: https://gerrit.libreoffice.org/71582
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

solenv/gbuild/TargetLocations.mk

@@ -146,9 +146,9 @@ gb_Package_get_target_for_build = $(WORKDIR_FOR_BUILD)/Package/$(1).filelist
 gb_PackageSet_get_target = $(WORKDIR)/PackageSet/$(1).filelist
 gb_PackageInfo_get_target = $(WORKDIR)/PackageInfo
 gb_Postprocess_get_target = $(WORKDIR)/Postprocess/$(1)
-gb_PrecompiledHeader_get_dep_target = $(WORKDIR)/Dep/PrecompiledHeader/$(call gb_PrecompiledHeader__get_debugdir,$(2))/$(1).hxx.gch.d
+gb_PrecompiledHeader_get_dep_target = $(WORKDIR)/Dep/PrecompiledHeader/$(call gb_PrecompiledHeader__get_debugdir,$(2))/$(1).hxx$(gb_PrecompiledHeader_EXT).d
 gb_PrecompiledHeader_get_dep_target_tmp = $(call gb_PrecompiledHeader_get_dep_target,$(1),$(2)).tmp
-gb_PrecompiledHeader_get_target = $(WORKDIR)/PrecompiledHeader/$(call gb_PrecompiledHeader__get_debugdir,$(2))/$(1).hxx.gch
+gb_PrecompiledHeader_get_target = $(WORKDIR)/PrecompiledHeader/$(call gb_PrecompiledHeader__get_debugdir,$(2))/$(1).hxx$(gb_PrecompiledHeader_EXT)
 gb_PrecompiledHeader_get_timestamp = $(WORKDIR)/PrecompiledHeader/$(call gb_PrecompiledHeader__get_debugdir,$(1))/Timestamps/$(1)
 gb_PropertiesTranslateTarget_get_target = $(WORKDIR)/PropertiesTranslateTarget/$(1).properties
 gb_Pyuno_get_final_target = $(WORKDIR)/Pyuno/$(1).final

solenv/gbuild/platform/com_GCC_class.mk

@@ -80,9 +80,11 @@ endef
 
 ifeq ($(COM_IS_CLANG),TRUE)
 gb_PrecompiledHeader_get_enableflags = -include-pch $(call gb_PrecompiledHeader_get_target,$(1),$(2))
+gb_PrecompiledHeader_EXT := .pch
 else
 gb_PrecompiledHeader_get_enableflags = -include $(notdir $(subst .gch,,$(call gb_PrecompiledHeader_get_target,$(1),$(2)))) \
 				       -I $(dir $(call gb_PrecompiledHeader_get_target,$(1),$(2)))
+gb_PrecompiledHeader_EXT := .gch
 endif
 
 # Clang and gcc do not need any extra .o file for PCH

solenv/gbuild/platform/com_MSC_class.mk

@@ -71,6 +71,8 @@ gb_PrecompiledHeader_get_enableflags = -Yu$(1).hxx \
 	-Fp$(call gb_PrecompiledHeader_get_target,$(1),$(2)) \
 	$(gb_PCHWARNINGS)
 
+gb_PrecompiledHeader_EXT := .pch
+
 # MSVC PCH needs extra .obj created during the creation of the PCH file
 gb_PrecompiledHeader_get_objectfile = $(1).obj