Question: I was compiling Ruby version 1.9.3 on a CentOS machine and landed up with the below error message while executing make command.
EC_GROUP_new_curve_GF2m undeclared (first use in this function)
The error occurred while compiling ossl_pkey_ec.c file.
Here’s the snapshot of the complete error:
#make ossl_pkey_ec.c: In function âossl_ec_group_initializeâ: ossl_pkey_ec.c:761:17: warning: implicit declaration of function âEC_GF2m_simple method [-Wimplicit-function-declaration] method = EC_GF2m_simple_method(); ^ ossl_pkey_ec.c:761:24: warning: assignment makes pointer from integer without a cast [enabled by default] method = EC_GF2m_simple_method(); ^ ossl_pkey_ec.c:816:29: error: âEC_GROUP_new_curve_GF2mâ undeclared (first use in this function) new_curve = EC_GROUP_new_curve_GF2m; ^ ossl_pkey_ec.c:816:29: note: each undeclared identifier is reported only once for each function it appears in make: *** [ossl_pkey_ec.o] Error 1 make: Leaving directory `/root/ruby-1.9.3-p374/ext/openssl' make: *** [ext/openssl/all] Error 2 make: Leaving directory `/root/ruby-1.9.3-p374' make: *** [build-ext] Error 2
Help me to solve the error.
A simple Google search on the error message EC_GROUP_new_curve_GF2m undeclared (first use in this function) hinted that it’s a known bug in Ruby with OpenSSL build. Fortunately, the developers had fixed the issue with a patch.
Follow the below steps to run the patch before building (make) Ruby:
Step 1: I assume that your present working directory is the Ruby source directory.
Step 2: Download the patch as shown below:
# wget https://bugs.ruby-lang.org/attachments/download/3707/out.patch
# ls out.patch out.patch
Step 3: Find out the file that you need to patch. From the above error message, it’s clear that the bug is present in ‘ossl_pkey_ec.c’ file.
# find . -name ossl_pkey_ec.c ./ext/openssl/ossl_pkey_ec.c
Step 4: Run the downloaded patch
# patch ./ext/openssl/ossl_pkey_ec.c < out.patch patching file ./ext/openssl/ossl_pkey_ec.c Hunk #1 succeeded at 757 (offset -5 lines). Hunk #2 succeeded at 814 (offset -5 lines). patching file ./ext/openssl/ossl_pkey_ec.c Hunk #1 FAILED at 7. 1 out of 1 hunk FAILED -- saving rejects to file ./ext/openssl/ossl_pkey_ec.c.rej
Now the patch is done. Try building Ruby again.
[Ruby_source_directory] # make
Hope it helps.