Re: [autoconf] Problems Configuring (C Compiler cannot produce executables)

[suzuki toshiya]

Jeffrey Walton wrote:
> Hi Suzuki,
> 
>> So I wonder why you want autoconf
>> to "fix" the result caused by your CFLAGS
> I was trying to set CFLAGS, CPPFLAGS, etc though `configure`. Its a
> supported option, and Autoconf produced the configure file. Where else
> would you suggest I look?

In your environment,

gcc "your set of CFLAGS" -o hello.exe hello.c

can generate the executable successfully?

>> Anyway, you didn't clarified how such special flags are required,
>> and the coverages of the objects to be compiled with the special
>> flags, so nobody will be able to the answer to be used immediately.
> I was not aware hardeneing was considered "special flags" and we had
> to justify their usage :) Security conscious folks usually look at it
> the other way: we look at a typical project's configuration, and ask
> why they are not being used. Anyway, the flags have actually been
> around for some time, but most folks don't use them. -1 to those folks
> for ignoring awesome platform security measures.
> 
> Projects use `configure` to configure all binaries output in a project
> - regardless of the binary type (executable or shared object). Though
> there may be multiple executables and shared objects, there is only
> one configure. So I need something that provides what I
> want/desire/require at the single configure point.
> 
> I want hardened executables and shared objects. That includes ASLR,
> which means -fPIE -pie for executables; -fPIC and -shared for shared
> objects. According to the dialog from the GCC feature request, -fPIC
> and -shared should be used as it appears to be a "superset" of -fPIE
> -pie.
> 
> Jeff
> 
> On Tue, Aug 21, 2012 at 9:59 PM, suzuki toshiya
> <address@hidden> wrote:
>> I think your set of CFLAGS makes GCC disabled to make a simple
>> executables like "hello world". So I wonder why you want autoconf
>> to "fix" the result caused by your CFLAGS. For generic CFLAGS,
>> you must set CFLAGS that the compiler can make an executable
>> successfully. You gave CFLAGS that the compiler cannot make
>> an executable.
>>
>> Also I've checked the discussion on GCC bugzilla; Andrew Pinski
>> mentioned automake, but I don't think he recommends a method using
>> "CFLAGS=blahblahblah ./configure". I guess he recommends to write
>> configure.am & Makefile.am to insert non-generic & special flags
>> in the compiling for shared object.
>>
>> Anyway, you didn't clarified how such special flags are required,
>> and the coverages of the objects to be compiled with the special
>> flags, so nobody will be able to the answer to be used immediately.
>>
>> Regards,
>> mpsuzuki
>>
>> Jeffrey Walton wrote:
>>> Hi All,
>>>
>>> Any ideas on how to fix this? I was using -fPIC/-shared due to
>>> limitations in Make and LDFLAGS. According to [1], we can use
>>> -fPIC/-shared all the time.
>>>
>>> $ ./configure CFLAGS="-Wall -Wextra -Wconversion -fPIC
>>> -Wno-unused-parameter -Wformat=2 -Wformat-security
>>> -fstack-protector-all -Wstrict-overflow -Wl,-shared -Wl,-z,noexecstack
>>> -Wl,-z,relro -Wl,-z,now"
>>> checking build system type... x86_64-unknown-linux-gnu
>>> checking host system type... x86_64-unknown-linux-gnu
>>> checking target system type... x86_64-unknown-linux-gnu
>>> checking for gcc... gcc
>>> checking whether the C compiler works... no
>>> configure: error: in `/home/jeffrey/Desktop/sipwitch-1.3.1':
>>> configure: error: C compiler cannot create executables
>>> See `config.log' for more details
>>>
>>> Jeff
>>>
>>> [1] "Request: Add -aslr switch that invokes -fPIE/-pie or
>>> -fPIC/-shared as appropriate,"
>>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52885
>>>
>>> *****
>>>
>>> This file contains any messages produced by compilers while
>>> running configure, to aid debugging if configure makes a mistake.
>>>
>>> It was created by configure, which was
>>> generated by GNU Autoconf 2.68.  Invocation command line was
>>>
>>>   $ ./configure CFLAGS=-Wall -Wextra -Wconversion -fPIC
>>> -Wno-unused-parameter -Wformat=2 -Wformat-security
>>> -fstack-protector-all -Wstrict-overflow -Wl,-shared -Wl,-z,noexecstack
>>> -Wl,-z,relro -Wl,-z,now
>>>
>>> ## --------- ##
>>> ## Platform. ##
>>> ## --------- ##
>>>
>>> hostname = mint-12-x64
>>> uname -m = x86_64
>>> uname -r = 3.0.0-12-generic
>>> uname -s = Linux
>>> uname -v = #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011
>>>
>>> /usr/bin/uname -p = unknown
>>> /bin/uname -X     = unknown
>>>
>>> /bin/arch              = unknown
>>> /usr/bin/arch -k       = unknown
>>> /usr/convex/getsysinfo = unknown
>>> /usr/bin/hostinfo      = unknown
>>> /bin/machine           = unknown
>>> /usr/bin/oslevel       = unknown
>>> /bin/universe          = unknown
>>>
>>> PATH: /usr/lib/lightdm/lightdm
>>> PATH: /usr/local/sbin
>>> PATH: /usr/local/bin
>>> PATH: /usr/sbin
>>> PATH: /usr/bin
>>> PATH: /sbin
>>> PATH: /bin
>>> PATH: /usr/games
>>>
>>>
>>> ## ----------- ##
>>> ## Core tests. ##
>>> ## ----------- ##
>>>
>>> configure:2456: checking build system type
>>> configure:2470: result: x86_64-unknown-linux-gnu
>>> configure:2490: checking host system type
>>> configure:2503: result: x86_64-unknown-linux-gnu
>>> configure:2523: checking target system type
>>> configure:2536: result: x86_64-unknown-linux-gnu
>>> configure:2611: checking for gcc
>>> configure:2627: found /usr/bin/gcc
>>> configure:2638: result: gcc
>>> configure:2867: checking for C compiler version
>>> configure:2876: gcc --version >&5
>>> gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
>>> Copyright (C) 2011 Free Software Foundation, Inc.
>>> This is free software; see the source for copying conditions.  There is NO
>>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>>>
>>> configure:2887: $? = 0
>>> configure:2876: gcc -v >&5
>>> Using built-in specs.
>>> COLLECT_GCC=gcc
>>> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper
>>> Target: x86_64-linux-gnu
>>> Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
>>> 4.6.1-9ubuntu3'
>>> --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
>>> --enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr
>>> --program-suffix=-4.6 --enable-shared --enable-linker-build-id
>>> --with-system-zlib --libexecdir=/usr/lib --without-included-gettext
>>> --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
>>> --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
>>> --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin
>>> --enable-objc-gc --disable-werror --with-arch-32=i686
>>> --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
>>> --host=x86_64-linux-gnu --target=x86_64-linux-gnu
>>> Thread model: posix
>>> gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
>>> configure:2887: $? = 0
>>> configure:2876: gcc -V >&5
>>> gcc: error: unrecognized option '-V'
>>> gcc: fatal error: no input files
>>> compilation terminated.
>>> configure:2887: $? = 4
>>> configure:2876: gcc -qversion >&5
>>> gcc: error: unrecognized option '-qversion'
>>> gcc: fatal error: no input files
>>> compilation terminated.
>>> configure:2887: $? = 4
>>> configure:2907: checking whether the C compiler works
>>> configure:2929: gcc -Wall -Wextra -Wconversion -fPIC
>>> -Wno-unused-parameter -Wformat=2 -Wformat-security
>>> -fstack-protector-all -Wstrict-overflow -Wl,-shared -Wl,-z,noexecstack
>>> -Wl,-z,relro -Wl,-z,now   conftest.c  >&5
>>> /usr/bin/ld: 
>>> /usr/lib/gcc/x86_64-linux-gnu/4.6.1/../../../x86_64-linux-gnu/crt1.o:
>>> relocation R_X86_64_32S against `__libc_csu_fini' can not be used when
>>> making a shared object; recompile with -fPIC
>>> /usr/lib/gcc/x86_64-linux-gnu/4.6.1/../../../x86_64-linux-gnu/crt1.o:
>>> could not read symbols: Bad value
>>> collect2: ld returned 1 exit status
>>> configure:2933: $? = 1
>>> configure:2971: result: no
>>> configure: failed program was:
>>> | /* confdefs.h */
>>> | #define PACKAGE_NAME ""
>>> | #define PACKAGE_TARNAME ""
>>> | #define PACKAGE_VERSION ""
>>> | #define PACKAGE_STRING ""
>>> | #define PACKAGE_BUGREPORT ""
>>> | #define PACKAGE_URL ""
>>> | /* end confdefs.h.  */
>>> |
>>> | int
>>> | main ()
>>> | {
>>> |
>>> |   ;
>>> |   return 0;
>>> | }
>>> configure:2976: error: in `/home/jeffrey/Desktop/sipwitch-1.3.1':
>>> configure:2978: error: C compiler cannot create executables
>>> See `config.log' for more details
>>>
>>> ## ---------------- ##
>>> ## Cache variables. ##
>>> ## ---------------- ##
>>>
>>> ac_cv_build=x86_64-unknown-linux-gnu
>>> ac_cv_env_CCC_set=
>>> ac_cv_env_CCC_value=
>>> ac_cv_env_CC_set=
>>> ac_cv_env_CC_value=
>>> ac_cv_env_CFLAGS_set=set
>>> ac_cv_env_CFLAGS_value='-Wall -Wextra -Wconversion -fPIC
>>> -Wno-unused-parameter -Wformat=2 -Wformat-security
>>> -fstack-protector-all -Wstrict-overflow -Wl,-shared -Wl,-z,noexecstack
>>> -Wl,-z,relro -Wl,-z,now'
>>> ac_cv_env_CPPFLAGS_set=
>>> ac_cv_env_CPPFLAGS_value=
>>> ac_cv_env_CPP_set=
>>> ac_cv_env_CPP_value=
>>> ac_cv_env_CXXCPP_set=
>>> ac_cv_env_CXXCPP_value=
>>> ac_cv_env_CXXFLAGS_set=
>>> ac_cv_env_CXXFLAGS_value=
>>> ac_cv_env_CXX_set=
>>> ac_cv_env_CXX_value=
>>> ac_cv_env_EXOSIP2_CFLAGS_set=
>>> ac_cv_env_EXOSIP2_CFLAGS_value=
>>> ac_cv_env_EXOSIP2_LIBS_set=
>>> ac_cv_env_EXOSIP2_LIBS_value=
>>> ac_cv_env_LDFLAGS_set=
>>> ac_cv_env_LDFLAGS_value=
>>> ac_cv_env_LIBOSIP2_CFLAGS_set=
>>> ac_cv_env_LIBOSIP2_CFLAGS_value=
>>> ac_cv_env_LIBOSIP2_LIBS_set=
>>> ac_cv_env_LIBOSIP2_LIBS_value=
>>> ac_cv_env_LIBS_set=
>>> ac_cv_env_LIBS_value=
>>> ac_cv_env_PKG_CONFIG_LIBDIR_set=
>>> ac_cv_env_PKG_CONFIG_LIBDIR_value=
>>> ac_cv_env_PKG_CONFIG_PATH_set=
>>> ac_cv_env_PKG_CONFIG_PATH_value=
>>> ac_cv_env_PKG_CONFIG_set=
>>> ac_cv_env_PKG_CONFIG_value=
>>> ac_cv_env_QT_CFLAGS_set=
>>> ac_cv_env_QT_CFLAGS_value=
>>> ac_cv_env_QT_LIBS_set=
>>> ac_cv_env_QT_LIBS_value=
>>> ac_cv_env_UCOMMON_CFLAGS_set=
>>> ac_cv_env_UCOMMON_CFLAGS_value=
>>> ac_cv_env_UCOMMON_LIBS_set=
>>> ac_cv_env_UCOMMON_LIBS_value=
>>> ac_cv_env_ZEROCONF_CFLAGS_set=
>>> ac_cv_env_ZEROCONF_CFLAGS_value=
>>> ac_cv_env_ZEROCONF_LIBS_set=
>>> ac_cv_env_ZEROCONF_LIBS_value=
>>> ac_cv_env_build_alias_set=
>>> ac_cv_env_build_alias_value=
>>> ac_cv_env_host_alias_set=
>>> ac_cv_env_host_alias_value=
>>> ac_cv_env_target_alias_set=
>>> ac_cv_env_target_alias_value=
>>> ac_cv_host=x86_64-unknown-linux-gnu
>>> ac_cv_prog_ac_ct_CC=gcc
>>> ac_cv_target=x86_64-unknown-linux-gnu
>>>
>>> ## ----------------- ##
>>> ## Output variables. ##
>>> ## ----------------- ##
>>>
>>> ACLOCAL=''
>>> AMDEPBACKSLASH=''
>>> AMDEP_FALSE=''
>>> AMDEP_TRUE=''
>>> AMTAR=''
>>> AR=''
>>> AS=''
>>> AUTOCONF=''
>>> AUTOHEADER=''
>>> AUTOMAKE=''
>>> AWK=''
>>> CC='gcc'
>>> CCDEPMODE=''
>>> CFLAGS='-Wall -Wextra -Wconversion -fPIC -Wno-unused-parameter
>>> -Wformat=2 -Wformat-security -fstack-protector-all -Wstrict-overflow
>>> -Wl,-shared -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now'
>>> CPP=''
>>> CPPFLAGS=''
>>> CXX=''
>>> CXXCPP=''
>>> CXXDEPMODE=''
>>> CXXFLAGS=''
>>> CYGPATH_W=''
>>> DAEMON_LIBS=''
>>> DEFS=''
>>> DEPDIR=''
>>> DLLTOOL=''
>>> DLOPEN=''
>>> DSYMUTIL=''
>>> DUMPBIN=''
>>> ECHO_C=''
>>> ECHO_N='-n'
>>> ECHO_T=''
>>> EGREP=''
>>> EXEEXT=''
>>> EXOSIP2_CFLAGS=''
>>> EXOSIP2_LIBS=''
>>> EXPORT_FLAGS=''
>>> EXPORT_LIBS=''
>>> FGREP=''
>>> GREP=''
>>> INCLUDE_FLAGS=''
>>> INITRDDIR=''
>>> INSTALL_DATA=''
>>> INSTALL_PROGRAM=''
>>> INSTALL_SCRIPT=''
>>> INSTALL_STRIP_PROGRAM=''
>>> LD=''
>>> LDFLAGS=''
>>> LIBOBJS=''
>>> LIBOSIP2_CFLAGS=''
>>> LIBOSIP2_LIBS=''
>>> LIBS=''
>>> LIBTOOL=''
>>> LIPO=''
>>> LN_S=''
>>> LTLIBOBJS=''
>>> LT_VERSION='1:6:0'
>>> MAKEINFO=''
>>> MANIFEST_TOOL=''
>>> MKDIR_P=''
>>> MOC=''
>>> MODFLAGS=''
>>> NETWORK_DOWN=''
>>> NETWORK_RELOAD=''
>>> NETWORK_UP=''
>>> NM=''
>>> NMEDIT=''
>>> OBJDUMP=''
>>> OBJEXT=''
>>> OTOOL64=''
>>> OTOOL=''
>>> PACKAGE=''
>>> PACKAGE_BUGREPORT=''
>>> PACKAGE_NAME=''
>>> PACKAGE_STRING=''
>>> PACKAGE_TARNAME=''
>>> PACKAGE_URL=''
>>> PACKAGE_VERSION=''
>>> PATH_SEPARATOR=':'
>>> PKG_CONFIG=''
>>> PKG_CONFIG_LIBDIR=''
>>> PKG_CONFIG_PATH=''
>>> QTAPPS=''
>>> QT_CFLAGS=''
>>> QT_LIBS=''
>>> RANLIB=''
>>> RCC=''
>>> SED=''
>>> SET_MAKE=''
>>> SHELL='/bin/bash'
>>> SIPWITCH_EXOSIP2=''
>>> SIPWITCH_FLAGS=''
>>> SIPWITCH_LIBS=''
>>> STATIC_MODULES_FALSE=''
>>> STATIC_MODULES_TRUE=''
>>> STRIP=''
>>> UCOMMON=''
>>> UCOMMON_CFLAGS=''
>>> UCOMMON_CLINK=''
>>> UCOMMON_LIBS=''
>>> UCOMMON_LINK=''
>>> UCOMMON_MODEL=''
>>> UCOMMON_REQUIRES='5.2.0'
>>> UIC=''
>>> USECURE_LINK=''
>>> VERSION='1.3.1'
>>> ZEROCONF_CFLAGS=''
>>> ZEROCONF_FALSE=''
>>> ZEROCONF_LIBS=''
>>> ZEROCONF_TRUE=''
>>> ac_ct_AR=''
>>> ac_ct_CC='gcc'
>>> ac_ct_CXX=''
>>> ac_ct_DUMPBIN=''
>>> am__EXEEXT_FALSE=''
>>> am__EXEEXT_TRUE=''
>>> am__fastdepCC_FALSE=''
>>> am__fastdepCC_TRUE=''
>>> am__fastdepCXX_FALSE=''
>>> am__fastdepCXX_TRUE=''
>>> am__include=''
>>> am__isrc=''
>>> am__leading_dot=''
>>> am__nodep=''
>>> am__quote=''
>>> am__tar=''
>>> am__untar=''
>>> bindir='${exec_prefix}/bin'
>>> build='x86_64-unknown-linux-gnu'
>>> build_alias=''
>>> build_cpu='x86_64'
>>> build_os='linux-gnu'
>>> build_vendor='unknown'
>>> cgibindir=''
>>> datadir='${datarootdir}'
>>> datarootdir='${prefix}/share'
>>> default_cfgpath=''
>>> default_incpath=''
>>> default_libexec=''
>>> default_libpath=''
>>> default_varpath=''
>>> docdir='${datarootdir}/doc/${PACKAGE}'
>>> dvidir='${docdir}'
>>> exec_prefix='NONE'
>>> host='x86_64-unknown-linux-gnu'
>>> host_alias=''
>>> host_cpu='x86_64'
>>> host_os='linux-gnu'
>>> host_vendor='unknown'
>>> htmldir='${docdir}'
>>> includedir='${prefix}/include'
>>> infodir='${datarootdir}/info'
>>> install_sh=''
>>> libdir='${exec_prefix}/lib'
>>> libexecdir='${exec_prefix}/libexec'
>>> localedir='${datarootdir}/locale'
>>> localstatedir='${prefix}/var'
>>> mandir='${datarootdir}/man'
>>> mkdir_p=''
>>> oldincludedir='/usr/include'
>>> pdfdir='${docdir}'
>>> plugindir=''
>>> prefix='NONE'
>>> prefix_libdir=''
>>> program_transform_name='s,x,x,'
>>> psdir='${docdir}'
>>> sbindir='${exec_prefix}/sbin'
>>> sharedstatedir='${prefix}/com'
>>> sysconfdir='${prefix}/etc'
>>> target='x86_64-unknown-linux-gnu'
>>> target_alias=''
>>> target_cpu='x86_64'
>>> target_os='linux-gnu'
>>> target_vendor='unknown'
>>> translatedir=''
>>> translations=''
>>>
>>> ## ----------- ##
>>> ## confdefs.h. ##
>>> ## ----------- ##
>>>
>>> /* confdefs.h */
>>> #define PACKAGE_NAME ""
>>> #define PACKAGE_TARNAME ""
>>> #define PACKAGE_VERSION ""
>>> #define PACKAGE_STRING ""
>>> #define PACKAGE_BUGREPORT ""
>>> #define PACKAGE_URL ""
>>>
>>> configure: exit 77
>>>
>>> _______________________________________________
>>> Autoconf mailing list
>>> address@hidden
>>> https://lists.gnu.org/mailman/listinfo/autoconf
>>
>> _______________________________________________
>> Autoconf mailing list
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>> https://lists.gnu.org/mailman/listinfo/autoconf