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

[Rob Hermann]

[root at rhlinuxdev test]# ls -l md2test.c
-r--r--r--. 1 rhermann centadmin 0 Feb 12 15:40 md2test.c


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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>>
>>