gcc でコンパイル時にインクルードパスとその優先順位を確認する方法

gcc に -v オプションをつければよいみたい。

$ gcc -v -c hoge.c 
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --enable-languages=c,c++ --disable-libgcj --host=i386-redhat-linux
Thread model: posix
gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-47.3)
 /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/cc1 -lang-c -v -D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=3 -D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i386__ hoge.c -quiet -dumpbase hoge.c -version -o /tmp/ccQ5Ldci.s
GNU CPP version 3.2.3 20030502 (Red Hat Linux 3.2.3-47.3) (cpplib) (i386 Linux/ELF)
GNU C version 3.2.3 20030502 (Red Hat Linux 3.2.3-47.3) (i386-redhat-linux)
        compiled by GNU C version 3.2.3 20030502 (Red Hat Linux 3.2.3-47.3).
ignoring nonexistent directory "/usr/i386-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib/gcc-lib/i386-redhat-linux/3.2.3/include
 /usr/include
End of search list.
 as -V -Qy -o hoge.o /tmp/ccQ5Ldci.s
GNU assembler version 2.15.92.0.2 (i386-redhat-linux) using BFD version 2.15.92.0.2 20040927