Hi All, I want to know which C / C++ standard my gcc is supported, Is there any method to find ? >From below site, they say C standard is ‘gnu90’, and C++ standard is ‘gnu++98’. http://gcc.gnu.org/onlinedocs/gcc/Standards.html Is it applicable to all gcc versions currently available? If so,how can i check it. I try using below method [naveen@localhost ~]$ gcc -std=gnu99 test1.c -v Using built-in specs. Target: i386-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-cpu=generic --build=i386-redhat-linux Thread model: posix gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% COLLECT_GCC_OPTIONS='-std=gnu99' '-v' '-mtune=generic' %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% /usr/libexec/gcc/i386-redhat-linux/4.3.2/cc1 -quiet -v test1.c -quiet -dumpbase test1.c -mtune=generic -auxbase test1 -std=gnu99 -version -o /tmp/cc29vt4p.s ignoring nonexistent directory "/usr/lib/gcc/i386-redhat-linux/4.3.2/include-fixed" ignoring nonexistent directory "/usr/lib/gcc/i386-redhat-linux/4.3.2/../../../../i386-redhat-linux/include" #include "..." search starts here: #include <...> search starts here: /usr/local/include /usr/lib/gcc/i386-redhat-linux/4.3.2/include /usr/include End of search list. GNU C (GCC) version 4.3.2 20081105 (Red Hat 4.3.2-7) (i386-redhat-linux) compiled by GNU C version 4.3.2 20081105 (Red Hat 4.3.2-7), GMP version 4.2.2, MPFR version 2.3.2. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 3bee52601079f736b7b63b762646f4ba test1.c: In function âmainâ: test1.c:4: warning: implicit declaration of function âtestâ test1.c: At top level: test1.c:7: warning: return type defaults to âintâ COLLECT_GCC_OPTIONS='-std=gnu99' '-v' '-mtune=generic' as -V -Qy -o /tmp/ccu4rDxE.o /tmp/cc29vt4p.s GNU assembler version 2.18.50.0.9 (i386-redhat-linux) using BFD version version 2.18.50.0.9-7.fc10 20080822 COMPILER_PATH=/usr/libexec/gcc/i386-redhat-linux/4.3.2/:/usr/libexec/gcc/i386-redhat-linux/4.3.2/:/usr/libexec/gcc/i386-redhat-linux/:/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-redhat-linux/:/usr/libexec/gcc/i386-redhat-linux/4.3.2/:/usr/libexec/gcc/i386-redhat-linux/:/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-redhat-linux/ LIBRARY_PATH=/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-redhat-linux/4.3.2/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-std=gnu99' '-v' '-mtune=generic' /usr/libexec/gcc/i386-redhat-linux/4.3.2/collect2 --eh-frame-hdr --build-id -m elf_i386 --hash-style=gnu -dynamic-linker /lib/ld-linux.so.2 /usr/lib/gcc/i386-redhat-linux/4.3.2/../../../crt1.o /usr/lib/gcc/i386-redhat-linux/4.3.2/../../../crti.o /usr/lib/gcc/i386-redhat-linux/4.3.2/crtbegin.o -L/usr/lib/gcc/i386-redhat-linux/4.3.2 -L/usr/lib/gcc/i386-redhat-linux/4.3.2 -L/usr/lib/gcc/i386-redhat-linux/4.3.2/../../.. /tmp/ccu4rDxE.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/i386-redhat-linux/4.3.2/crtend.o /usr/lib/gcc/i386-redhat-linux/4.3.2/../../../crtn.o so is above method correct. or is there any other method ? Thanks.
