warnings not enabled for gcc builds

[toxeus]

See this travis build logs:

• gcc dynamic

  ~ ▶ curl -s https://api.travis-ci.org/v3/job/389539896/log.txt | grep 'uninitialized'
  test/chain/block.cpp: In member function ‘void chain_block_tests::block__is_valid_merkle_root__uninitialized__returns_true::test_method()’:

• gcc static

  ~ ▶ curl -s https://api.travis-ci.org/v3/job/389539897/log.txt | grep 'uninitialized'
  dictbe.cpp:1050:60: warning: ‘current’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  dictbe.cpp:813:60: warning: ‘current’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  dictbe.cpp:620:60: warning: ‘current’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  dictbe.cpp:424:60: warning: ‘current’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  ../common/unicode/unistr.h:4158:64: warning: ‘relativeStringOffset’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  test/chain/block.cpp: In member function ‘void chain_block_tests::block__is_valid_merkle_root__uninitialized__returns_true::test_method()’:

• clang (all flavours; this is the expected output)

  ~ ▶ curl -s https://api.travis-ci.org/v3/job/389539888/log.txt | grep 'uninitialized'
  src/settings.cpp:33:44: warning: field 'retargeting_factor_' is uninitialized when used here [-Wuninitialized]
  src/settings.cpp:34:44: warning: field 'retargeting_factor_' is uninitialized when used here [-Wuninitialized]
  src/settings.cpp:35:52: warning: field 'target_spacing_seconds_' is uninitialized when used here [-Wuninitialized]
  ``
  

I have the same issue locally. The Makefile generated by configure contains the following lines.

CFLAGS = -g -O2 -Wall -Wextra -Wpedantic -Wno-long-long
CPPFLAGS =
CXXFLAGS = -g -O2 -std=c++11 -Wno-deprecated-declarations -Wno-missing-braces -fvisibility-inlines-hidden -fno-var-tracking-assignments

If I manually append the warning flags from CFLAGS to CXXFLAGS the expected warnings are enabled and printed.

[toxeus]

I'm getting warnings now when compiling with gcc. Therefore, I'm closing this.