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

[Matt Caswell]

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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