Removed -fcommon compile flag

makefile

@@ -45,7 +45,7 @@ CC=gcc
 CPP=g++
 WIN_DEFINES=WINVER=0x501
 LINUX_DEFINES=_GNU_SOURCE
-CFLAGS=-m32 -msse2 -mfpmath=sse -Wall -fno-omit-frame-pointer -fmax-errors=15 -fcommon
+CFLAGS=-m32 -msse2 -mfpmath=sse -Wall -fno-omit-frame-pointer -fmax-errors=15
 
 ifeq ($(DEBUG), true)
 DCFLAGS=-fno-pie -O0 -g
@@ -55,7 +55,7 @@ endif
 
 WIN_LFLAGS=-m32 -g -Wl,--nxcompat,--stack,0x800000 -mwindows -static-libgcc -static -lm
 WIN_LLIBS=tomcrypt mbedtls mbedcrypto mbedx509 ws2_32 wsock32 iphlpapi gdi32 winmm crypt32 stdc++
-LINUX_LFLAGS=-m32 -g -static-libgcc -rdynamic -Wl,-rpath=./ -fcommon
+LINUX_LFLAGS=-m32 -g -static-libgcc -rdynamic -Wl,-rpath=./
 LINUX_LLIBS=tomcrypt mbedtls mbedcrypto mbedx509 dl pthread m stdc++
 BSD_LLIBS=tomcrypt mbedtls mbedcrypto mbedx509 pthread m execinfo stdc++
 COD4X_DEFINES=COD4X18UPDATE BUILD_NUMBER=$(BUILD_NUMBER) BUILD_BRANCH=$(BUILD_BRANCH) BUILD_REVISION=$(BUILD_REVISION)