Fix to set -fvisibility-inlines-hidden flag only for C++ with g++ (completion of previous commit)

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

mkspecs/freebsd-clang/qmake.conf

@@ -12,7 +12,7 @@ QMAKE_LEX		= flex
 QMAKE_LEXFLAGS		=
 QMAKE_YACC		= yacc
 QMAKE_YACCFLAGS		= -d
-QMAKE_CFLAGS		= -pipe -fvisibility=hidden -fvisibility-inlines-hidden
+QMAKE_CFLAGS		= -pipe -fvisibility=hidden
 QMAKE_CFLAGS_DEPS	= -M
 QMAKE_CFLAGS_WARN_ON	= -Wall -W
 QMAKE_CFLAGS_WARN_OFF	= -w
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -pthread -D_THREAD_SAFE
 
 QMAKE_CXX		= clang++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF

mkspecs/linux-clang/qmake.conf

@@ -16,7 +16,7 @@ QMAKE_YACCFLAGS		= -d
 QMAKE_YACCFLAGS_MANGLE  = -p $base -b $base
 QMAKE_YACC_HEADER       = $base.tab.h
 QMAKE_YACC_SOURCE       = $base.tab.c
-QMAKE_CFLAGS		= -pipe -g -fvisibility=hidden -fvisibility-inlines-hidden
+QMAKE_CFLAGS		= -pipe -g -fvisibility=hidden
 QMAKE_CFLAGS_DEPS	= -M
 QMAKE_CFLAGS_WARN_ON	= -Wall -W
 QMAKE_CFLAGS_WARN_OFF	= -w
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= clang++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF