Linux - enable gcc 5.4 to use c++17 (#7406)

#changelog #linux

Author: dimitre

apps/projectGenerator

@@ -141,6 +141,11 @@ PLATFORM_CXXVER = -std=c++17
 GCC_MAJOR := $(shell expr `gcc -dumpversion | cut -f1 -d.`)
 GCC_MINOR := $(shell expr `gcc -dumpversion | cut -f2 -d.`)
 
+# $(info $(GCC_MAJOR))
+# $(info $(GCC_MINOR))
+# $(info ($(shell expr $(GCC_MAJOR) \>= 8), 1))
+# $(info ($(shell expr $(GCC_MINOR) \< 7), 1))
+
 ifeq ("$(GCC_MAJOR)","4")
 	ifeq ($(shell expr $(GCC_MINOR) \< 7), 1)
 		PLATFORM_CXXVER = -std=c++0x
@@ -163,6 +168,9 @@ else
 	endif
 	PLATFORM_CXXFLAGS += -DGCC_HAS_REGEX
 endif
+ifeq ("$(GCC_MAJOR)","5")
+	PLATFORM_CXXVER = -std=c++17
+endif
 
 PLATFORM_CFLAGS = $(PLATFORM_CXXFLAGS)
 PLATFORM_CXXFLAGS += $(PLATFORM_CXXVER)

libs/openFrameworksCompiled/project/makefileCommon/config.linux.common.mk

@@ -115,9 +115,9 @@ if [ "$ARCH" == "" ]; then
         if [ "$ARCH" == "x86_64" ]; then
             GCC_VERSION=$(gcc -dumpversion | cut -f1 -d.)
             if [ $GCC_VERSION -eq 4 ]; then
-                ARCH=64gcc4
+                ARCH=64gcc6
             elif [ $GCC_VERSION -eq 5 ]; then
-                ARCH=64gcc5
+                ARCH=64gcc6
             else
                 ARCH=64gcc6
             fi