Commits
François Saint-Jacques authored and Antoine Pitrou committed ad1697e5d25
ARROW-4862: [C++] Fix gcc warnings in CHECKIN - The recent change in DCHECK* (removing the ARROW_IGNORE_EXPR) added new compilation warnings. The simplest way to disable this is to disable unused variables or sprinkle ARROW_IGNORE_EXPR in a lot of places. I went for the first. - Added some checks to `system` return code in plasma tests - Disable `-Wstrict-overflow` for ArrayBuilder::CheckCapacity Author: François Saint-Jacques <fsaintjacques@gmail.com> Closes #3976 from fsaintjacques/ARROW-4962-gcc-warnings and squashes the following commits: 247e4a71e <François Saint-Jacques> Formating 64e87b484 <François Saint-Jacques> Abdicate to gcc 7bdf30cc1 <François Saint-Jacques> Add PLASMA_CHECK_SYSTEM 393920fce <François Saint-Jacques> Remove disable warning b5853b519 <François Saint-Jacques> Improve NullBuilder warnings fb775c7c4 <François Saint-Jacques> ARROW-4892: Fix gcc warnings in CHECKIN