How to resolve "no usable dependency style found" error while making GCC 4.9.1

Question

I want to install gcc 4.9.1. So I downloaded the tar ball, installed the dependencies, and ran config with -

./configure --program-suffix=-4.9.1 --disable-multilib

That worked fine.

But when I took the next step and fired make, I got the following error:

configure: error: no usable dependency style found
make[2]: *** [configure-stage1-gcc] Error 1

The error comes when make is trying to checking dependency style of /usr/bin and it finds none.

Can any one explain what is meant by checking dependency style of /usr/bin ?

Any idea when this issue comes and how to resolve it. I did some searching, could not find anything.

I am compiling on a 64 bit RHEL 6.x machine.

EDIT 1:

As advised by arm, I grepped for the error in the individual config.log's. Finally found it in one. Here are some contents

In file included from /usr/lib/gcc/x86_64-redhat-linux/4.4.4/../../../../include/c++/4.4.4/ext/hash_map:60,
                 from conftest.cpp:74:
/usr/lib/gcc/x86_64-redhat-linux/4.4.4/../../../../include/c++/4.4.4/backward/backward_warning.h:28:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file backward_warning.h. To disable this warning use -Wno-deprecated.
configure:8747: $? = 0
configure:8747: result: yes
configure:8794: checking dependency style of /usr/bin
configure:8825: trying gcc3
| depmode=gcc3 source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 115: /usr/bin: is a directory
configure:8825: trying gcc
| depmode=gcc source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 138: /usr/bin: is a directory
configure:8825: trying hp
| depmode=hp source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 138: /usr/bin: is a directory
configure:8825: trying sgi
| depmode=sgi source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 179: /usr/bin: is a directory
configure:8825: trying aix
| depmode=aix source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 237: /usr/bin: is a directory
configure:8825: trying icc
| depmode=icc source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 285: /usr/bin: is a directory
configure:8825: trying hp2
| depmode=hp2 source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 322: /usr/bin: is a directory
configure:8825: trying tru64
| depmode=tru64 source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 384: /usr/bin: is a directory
configure:8825: trying dashmstdout
| depmode=dashmstdout source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 415: /usr/bin: is a directory
configure:8825: trying dashXmstdout
| depmode=dashXmstdout source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 415: /usr/bin: is a directory
configure:8825: trying makedepend
| depmode=tru64 source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 384: /usr/bin: is a directory
configure:8825: trying dashmstdout
| depmode=dashmstdout source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 415: /usr/bin: is a directory
configure:8825: trying dashXmstdout
| depmode=dashXmstdout source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 415: /usr/bin: is a directory
configure:8825: trying makedepend
| depmode=makedepend source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 467: /usr/bin: is a directory
configure:8825: trying cpp
| depmode=cpp source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 518: /usr/bin: is a directory
configure:8825: trying msvisualcpp
| depmode=msvisualcpp source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 561: /usr/bin: is a directory
configure:8825: trying msvcmsys
| depmode=msvcmsys source=sub/conftest.c object=sub/conftest.o depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo /bin/sh ./depcomp /usr/bin -c -o sub/conftest.o sub/conftest.c
configure:8868: failure, diagnostics are:
| ./depcomp: line 561: /usr/bin: is a directory
configure:8879: result: none
configure:8882: error: no usable dependency style found

Answer 1

On CentOS/RedHat, it's very likely because you don't have g++ installed

$ which g++
// not found

---

Installing the Development Tools will solve this issue:

$ yum groupinstall 'Development Tools'
$ which g++
/usr/bin/g++