Use "C" instead user environment locale in solc

Changelog.md

@@ -11,7 +11,7 @@ Compiler Features:
 
 Bugfixes:
  * Yul IR Code Generation: Optimize embedded creation code with correct settings. This fixes potential mismatches between the constructor code of a contract compiled in isolation and the bytecode in ``type(C).creationCode``, resp. the bytecode used for ``new C(...)``.
-
+ * Fix internal error for locales with unusual capitalization rules. Locale set in the environment is now completely ignored.
 
 ### 0.8.12 (2022-02-16)
 

solc/main.cpp

@@ -27,40 +27,16 @@
 
 #include <boost/exception/all.hpp>
 
-#include <clocale>
 #include <iostream>
 
 using namespace std;
 using namespace solidity;
 
-/*
-The equivalent of setlocale(LC_ALL, "C") is called before any user code is run.
-If the user has an invalid environment setting then it is possible for the call
-to set locale to fail, so there are only two possible actions, the first is to
-throw a runtime exception and cause the program to quit (default behaviour),
-or the second is to modify the environment to something sensible (least
-surprising behaviour).
-
-The follow code produces the least surprising behaviour. It will use the user
-specified default locale if it is valid, and if not then it will modify the
-environment the process is running in to use a sensible default. This also means
-that users do not need to install language packs for their OS.
-*/
-static void setDefaultOrCLocale()
-{
-#if __unix__
-	if (!std::setlocale(LC_ALL, ""))
-	{
-		setenv("LC_ALL", "C", 1);
-	}
-#endif
-}
 
 int main(int argc, char** argv)
 {
 	try
 	{
-		setDefaultOrCLocale();
 		solidity::frontend::CommandLineInterface cli(cin, cout, cerr);
 		return cli.run(argc, argv) ? 0 : 1;
 	}