fatal error: 'tr1/tuple' file not found

[fgr-17]

Describe the bug
I can't compile the code on macOS Big Sur. It shows the following error:

• fatal error: 'tr1/tuple' file not found

To Reproduce
On macOS bigSur, after including <fff.h>, the compiler shows the following error:

fatal error: 'tr1/tuple' file not found

Expected behavior
flawless compilation

Compiler, toolset, platform (please complete the following information):

• OS: macOS big Sur
• Compiler: g++ --version
  Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
  Apple clang version 12.0.5 (clang-1205.0.22.11)
  Target: x86_64-apple-darwin20.5.0
  Thread model: posix
  InstalledDir: /Library/Developer/CommandLineTools/usr/bin

[cakira]

Hi @fgr-17 !

I searched for occurrences of "tuple" in the code and I could only find then in the file gtest/gtest.h. In the file fff.h there are no occurrences of tuple and neither of gtest.
Maybe your compiler is trying to compile everything in fff?