[openssl-users] Building OpenSSL on Linux , undefined reference to 'main'

[Matt Caswell]

On 15/02/16 22:21, Rob Hermann wrote:
> 
> 
> [root at rhlinuxdev test]# ls -l md2test.c
> -r--r--r--. 1 rhermann centadmin 0 Feb 12 15:40 md2test.c

That is slightly surprising for two reasons. Firstly that is an empty
file (size is 0). Secondly, it shouldn't be a file at all - it should be
a symbolic link! Looks like somehow or other it has got corrupted.

I also note that the date and timestamp is from a few days ago. Is that
when you last ran the build steps, or have you done it since?

>From the top level openssl directory try running "make clean" and "make
dclean" followed by going through the build steps again.

Matt


> 
> 
> On 2/15/2016 4:08 PM, Matt Caswell wrote:
>>
>> On 15/02/16 20:55, Rob Hermann wrote:
>>> To follow up with a bit more detail
>>>
>>> The version of OpenSSL is 1.0.2e.
>>>
>>> The exact steps inside of my Linux environment that I take are
>>>
>>> 1) log in as su.
>>> 2) run "make clean"
>>> 3) run "sh config zlib"
>>> the last line logged from this command is
>>> "Configured for linux-elf"
>> The only slightly strange thing here is running "make clean" before
>> running "config". Normally I would run it afterwards.
>>
>>  From the test directory, what does "ls -l md2test.c" tell us about the
>> link for that file?
>>
>> Matt
>>
>>> 4) run "make"
>>>
>>> the make gets as far as
>>>
>>> make[2]: Entering directory `/home/rhermann/src/OpenSSLWork/test'
>>> ( :; LIBDEPS="${LIBDEPS:--L.. -lssl -L.. -lcrypto  -ldl -lz}";
>>> LDCMD="${LDCMD:-gcc}"; LDFLAGS="${LDFLAGS:--DZLIB -DOPENSSL_THREADS
>>> -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -Wa,--noexecstack -DL_ENDIAN -O3
>>> -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS
>>> -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m
>>> -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
>>> -DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM}"; LIBPATH=`for x in $LIBDEPS;
>>> do echo $x; done | sed -e 's/^ *-L//;t' -e d | uniq`; LIBPATH=`echo
>>> $LIBPATH | sed -e 's/ /:/g'`; LD_LIBRARY_PATH=$LIBPATH:$LD_LIBRARY_PATH
>>> ${LDCMD} ${LDFLAGS} -o ${APPNAME:=ideatest} ideatest.o ${LIBDEPS} )
>>> make[2]: Leaving directory `/home/rhermann/src/OpenSSLWork/test'
>>> gcc -I.. -I../include  -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN
>>> -DHAVE_DLFCN_H -Wa,--noexecstack -DL_ENDIAN -O3 -fomit-frame-pointer
>>> -Wall -DOPENSSL_BN_ASM_PART_WORDS -DOPENSSL_IA32_SSE2
>>> -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM
>>> -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM -DVPAES_ASM
>>> -DWHIRLPOOL_ASM -DGHASH_ASM   -c -o md2test.o md2test.c
>>> make[2]: Entering directory `/home/rhermann/src/OpenSSLWork/test'
>>> ( :; LIBDEPS="${LIBDEPS:--L.. -lssl -L.. -lcrypto  -ldl -lz}";
>>> LDCMD="${LDCMD:-gcc}"; LDFLAGS="${LDFLAGS:--DZLIB -DOPENSSL_THREADS
>>> -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -Wa,--noexecstack -DL_ENDIAN -O3
>>> -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS
>>> -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m
>>> -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
>>> -DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM}"; LIBPATH=`for x in $LIBDEPS;
>>> do echo $x; done | sed -e 's/^ *-L//;t' -e d | uniq`; LIBPATH=`echo
>>> $LIBPATH | sed -e 's/ /:/g'`; LD_LIBRARY_PATH=$LIBPATH:$LD_LIBRARY_PATH
>>> ${LDCMD} ${LDFLAGS} -o ${APPNAME:=md2test} md2test.o ${LIBDEPS} )
>>> /usr/lib/gcc/i686-redhat-linux/4.4.7/../../../crt1.o: In function
>>> `_start':
>>> (.text+0x18): undefined reference to `main'
>>> collect2: ld returned 1 exit status
>>> make[2]: *** [link_app.] Error 1
>>> make[2]: Leaving directory `/home/rhermann/src/OpenSSLWork/test'
>>> make[1]: *** [md2test] Error 2
>>> make[1]: Leaving directory `/home/rhermann/src/OpenSSLWork/test'
>>> make: *** [build_tests] Error 1
>>>
>>>
>>> it  does make it through build bntest.o,  ectest.o , ecdsatest,o,
>>> ecdhtest.o, and ideatest.o
>>>
>>>
>>>
>>>
>>> On 2/15/2016 1:59 PM, Rob Hermann wrote:
>>>> I'm attempting to build OpenSSL on a Linux box, when I issue the make
>>>> from my OpenSSL directory (OpenSSLWork as seen here),   It  builds all
>>>> the subdirectories under crypto,
>>>> then proceeds to
>>>>
>>>> OpenSSLWork/engines
>>>> OpenSSLWork/ssl
>>>> OpenSSLWork/apps
>>>>
>>>> OpenSSLWork/test
>>>>
>>>>
>>>> making all in test...
>>>> make[1]: Entering directory `/home/rhermann/src/OpenSSLWork/test'
>>>> make[2]: Entering directory `/home/rhermann/src/OpenSSLWork/test'
>>>> ( :; LIBDEPS="${LIBDEPS:--L.. -lssl -L.. -lcrypto  -ldl}";
>>>> LDCMD="${LDCMD:-gcc}"; LDFLAGS="${LDFLAGS:--DOPENSSL_THREADS
>>>> -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -Wa,--noexecstack -DL_ENDIAN
>>>> -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS
>>>> -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m
>>>> -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM
>>>> -DVPAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM}"; LIBPATH=`for x in $LIBDEPS;
>>>> do echo $x; done | sed -e 's/^ *-L//;t' -e d | uniq`; LIBPATH=`echo
>>>> $LIBPATH | sed -e 's/ /:/g'`;
>>>> LD_LIBRARY_PATH=$LIBPATH:$LD_LIBRARY_PATH ${LDCMD} ${LDFLAGS} -o
>>>> ${APPNAME:=md2test} md2test.o ${LIBDEPS} )
>>>> _/usr/lib/gcc/i686-redhat-linux/4.4.7/../../../crt1.o: In function
>>>> `_start':__
>>>> __(.text+0x18): undefined reference to `main'__
>>>> _collect2: ld returned 1 exit status
>>>> make[2]: *** [link_app.] Error 1
>>>> make[2]: Leaving directory `/home/rhermann/src/OpenSSLWork/test'
>>>> make[1]: *** [md2test] Error 2
>>>> make[1]: Leaving directory `/home/rhermann/src/OpenSSLWork/test'
>>>> make: *** [build_tests] Error 1
>>>>
>>>> I know this means I'm missing the main() function the entry point for
>>>> all C programs.
>>>> I'm trying to build OpenSSL using the procedures outlined in the
>>>> INSTALL document,  Has anyone seen this before and if so, what have
>>>> you done to "fix" it ?
>>>>
>>>> I've tried -nostartfiles as a linker option and that did not help.
>>>>
>>>>
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>>>
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