remove make-specific code from config_host.mk

Apparently some people still try to source it from shell (scripts).

Change-Id: If26a5c5eb83739d3ccce043afd095000d355a543

config_host.mk.in

@@ -61,9 +61,7 @@ export CC_FOR_BUILD=@CC_FOR_BUILD@
 export CDR_CFLAGS=$(gb_SPACE)@CDR_CFLAGS@
 export CDR_LIBS=$(gb_SPACE)@CDR_LIBS@
 export CDR_TARBALL=@CDR_TARBALL@
-ifneq ($(strip @CFLAGS@),)
-export CFLAGS=@CFLAGS@
-endif
+@x_CFLAGS@ export CFLAGS=@CFLAGS@
 export CHECK_PARALLELISM=@CHECK_PARALLELISM@
 export CLANGPLUGIN_CPPFLAGS=@CLANGPLUGIN_CPPFLAGS@
 export CLUCENE_CFLAGS=$(gb_SPACE)@CLUCENE_CFLAGS@
@@ -98,9 +96,7 @@ export CURL_LIBS=$(gb_SPACE)@CURL_LIBS@
 export CXX=@CXX@
 export CXX_FOR_BUILD=@CXX_FOR_BUILD@
 export CXX_X64_BINARY=@CXX_X64_BINARY@
-ifneq ($(strip @CXXFLAGS@),)
-export CXXFLAGS=@CXXFLAGS@
-endif
+@x_CXXFLAGS@ export CXXFLAGS=@CXXFLAGS@
 export DATADIR=@DATADIR@
 export DBGHELP_DLL=@DBGHELP_DLL@
 export DBUSMENUGTK_CFLAGS=$(gb_SPACE)@DBUSMENUGTK_CFLAGS@
@@ -324,9 +320,7 @@ export L10N_MODULE=@L10N_MODULE@
 export LCMS2_CFLAGS=$(gb_SPACE)@LCMS2_CFLAGS@
 export LCMS2_LIBS=$(gb_SPACE)@LCMS2_LIBS@
 export LCMS2_TARBALL=@LCMS2_TARBALL@
-ifneq ($(strip @LDFLAGS@),)
-export LDFLAGS=@LDFLAGS@
-endif
+@x_LDFLAGS@ export LDFLAGS=@LDFLAGS@
 export LFS_CFLAGS=@LFS_CFLAGS@
 export LIBBASE_JAR=@LIBBASE_JAR@
 export LIBDIR=@LIBDIR@
@@ -462,12 +456,8 @@ export NSS_CFLAGS=$(gb_SPACE)@NSS_CFLAGS@
 export NSS_LIBS=$(gb_SPACE)@NSS_LIBS@
 export NSS_TARBALL=@NSS_TARBALL@
 export NUMBERTEXT_EXTENSION_PACK=@NUMBERTEXT_EXTENSION_PACK@
-ifneq ($(strip @OBJCFLAGS@),)
-export OBJCFLAGS=@OBJCFLAGS@
-endif
-ifneq ($(strip @OBJCXXFLAGS@),)
-export OBJCXXFLAGS=@OBJCXXFLAGS@
-endif
+@x_OBJCFLAGS@ export OBJCFLAGS=@OBJCFLAGS@
+@x_OBJCXXFLAGS@ export OBJCXXFLAGS=@OBJCXXFLAGS@
 export OBJDUMP=@OBJDUMP@
 export OOOBLOGGER_EXTENSION_PACK=@OOOBLOGGER_EXTENSION_PACK@
 export OOODMAKEMODE=YES

configure.ac

@@ -3350,38 +3350,53 @@ dnl by our build system, but explicit override is possible.
 AC_MSG_CHECKING(for explicit CFLAGS)
 if test -n "$CFLAGS"; then
     AC_MSG_RESULT([$CFLAGS])
+    x_CFLAGS=
 else
     AC_MSG_RESULT(no)
+    x_CFLAGS=[\#]
 fi
 AC_MSG_CHECKING(for explicit CXXFLAGS)
 if test -n "$CXXFLAGS"; then
     AC_MSG_RESULT([$CXXFLAGS])
+    x_CXXFLAGS=
 else
     AC_MSG_RESULT(no)
+    x_CXXFLAGS=[\#]
 fi
 AC_MSG_CHECKING(for explicit OBJCFLAGS)
 if test -n "$OBJCFLAGS"; then
     AC_MSG_RESULT([$OBJCFLAGS])
+    x_OBJCFLAGS=
 else
     AC_MSG_RESULT(no)
+    x_OBJCFLAGS=[\#]
 fi
 AC_MSG_CHECKING(for explicit OBJCXXFLAGS)
 if test -n "$OBJCXXFLAGS"; then
     AC_MSG_RESULT([$OBJCXXFLAGS])
+    x_OBJCXXFLAGS=
 else
     AC_MSG_RESULT(no)
+    x_OBJCXXFLAGS=[\#]
 fi
 AC_MSG_CHECKING(for explicit LDFLAGS)
 if test -n "$LDFLAGS"; then
     AC_MSG_RESULT([$LDFLAGS])
+    x_LDFLAGS=
 else
     AC_MSG_RESULT(no)
+    x_LDFLAGS=[\#]
 fi
 AC_SUBST(CFLAGS)
 AC_SUBST(CXXFLAGS)
 AC_SUBST(OBJCFLAGS)
 AC_SUBST(OBJCXXFLAGS)
 AC_SUBST(LDFLAGS)
+AC_SUBST(x_CFLAGS)
+AC_SUBST(x_CXXFLAGS)
+AC_SUBST(x_OBJCFLAGS)
+AC_SUBST(x_OBJCXXFLAGS)
+AC_SUBST(x_LDFLAGS)
 
 #
 # determine CPU, CPUNAME, GUI, GUIBASE, ...