CMake SINGLE_THREADED not WOLFSSL_SINGLE_THREADED

[gojimmypi]

Description

As @douzzer pointed out: there's no WOLFSSL_SINGLE_THREADED.

This update changes the root level CMakeFiles.txt to instead check SINGLE_THREADED.

There are probably more places here and in other repos that may need PTHREAD attention.

See also #6536 and #6549.

This change has already been applied in #6600.

Fixes zd# n/s

Testing

How did you test?

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[dgarske]

This is not the pre-processor this is the CMake argument. See add_option("WOLFSSL_SINGLE_THREADED" at 245. There is no issue here...

Please close PR.

[gojimmypi]

@dgarske do you have a Windows box to test on? From the current master branch, I am still seeing this CMake error:

C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6180,9): warning C4013: 'pthread_mutex_lock' undefined; assuming extern returning int [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6180,9): error C2039: 'mutex': is not a member of 'tcp_ready' [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\wolfssl/test.h(533,16): message : see declaration of 'tcp_ready' [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6182,9): warning C4013: 'pthread_cond_signal' undefined; assuming extern returning int [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6182,9): error C2039: 'cond': is not a member of 'tcp_ready' [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\wolfssl/test.h(533,16): message : see declaration of 'tcp_ready' [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6183,9): warning C4013: 'pthread_mutex_unlock' undefined; assuming extern returning int [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6183,9): error C2039: 'mutex': is not a member of 'tcp_ready' [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\wolfssl/test.h(533,16): message : see declaration of 'tcp_ready' [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]
C:\workspace\wolfssl-gojimmypi-bandi13\tests\api.c(6328,29): warning C4242: 'function': conversion from 'SOCKET' to 'int', possible loss of data [C:\workspace\wolfssl-gojimmypi-bandi13\out\unit_test.vcxproj]

This Visual Studio hover text may provide more insight: (see test.h)

No such error occurs for Linux CMake.

I'm thinking perhaps there needs to be some conditional gating in / around the PTHREAD_CHECK_RET definition. Do you agree?