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$ cat ./main.cpp
int foo();
int main()
{
foo();
}
$ gcc -c main.cpp
$ nm main.o
U _Z3foov <- mangled
0000000000000000 T main
下面的信息提示g++被使用。
$ gcc main.cpp -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.8.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-4.8-20130725/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --enable-gnu-unique-object --enable-linker-build-id --enable-cloog-backend=isl --disable-cloog-version-check --enable-lto --enable-gold --enable-ld=default --enable-plugin --with-plugin-ld=ld.gold --with-linker-hash-style=gnu --disable-install-libiberty --disable-multilib --disable-libssp --disable-werror --enable-checking=release
Thread model: posix
gcc version 4.8.1 20130725 (prerelease) (GCC)
COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.8.1/cc1plus -quiet -v -D_GNU_SOURCE main.cpp -quiet -dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main -version -o /tmp/cc1VXGmG.s
GNU C++ (GCC) version 4.8.1 20130725 (prerelease) (x86_64-unknown-linux-gnu)
compiled by GNU C version 4.8.1 20130725 (prerelease), GMP version 5.1.2, MPFR version 3.1.2, MPC version 1.0.1[/quote]
Thanks! You are right on the issue here.
just a side note here that using gcc (4.4.7) for cpp will have problem on linking process, certain c++ libraries will not be included. For my case libstdc++ was missing. You will have to explicitly append it to the make file.
So, calling g++ directly is the best choice. Anyway, this is not the topic of this post...$ cat ./main.cpp
int foo();
int main()
{
foo();
}
$ gcc -c main.cpp
$ nm main.o
U _Z3foov <- mangled
0000000000000000 T main
下面的信息提示g++被使用。
$ gcc main.cpp -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.8.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-4.8-20130725/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --enable-gnu-unique-object --enable-linker-build-id --enable-cloog-backend=isl --disable-cloog-version-check --enable-lto --enable-gold --enable-ld=default --enable-plugin --with-plugin-ld=ld.gold --with-linker-hash-style=gnu --disable-install-libiberty --disable-multilib --disable-libssp --disable-werror --enable-checking=release
Thread model: posix
gcc version 4.8.1 20130725 (prerelease) (GCC)
COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.8.1/cc1plus -quiet -v -D_GNU_SOURCE main.cpp -quiet -dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main -version -o /tmp/cc1VXGmG.s
GNU C++ (GCC) version 4.8.1 20130725 (prerelease) (x86_64-unknown-linux-gnu)
compiled by GNU C version 4.8.1 20130725 (prerelease), GMP version 5.1.2, MPFR version 3.1.2, MPC version 1.0.1