This is an alphabetical list of the environment variables that might influence Autoconf checks.
_: Special Shell VariablesBIN_SH: Special Shell VariablesCC: C CompilerCDPATH: Special Shell VariablesCFLAGS: C CompilerCFLAGS: Preset Output VariablesCLICOLOR_FORCE: Special Shell VariablesCONFIG_COMMANDS: Obsolete config.status UseCONFIG_FILES: Obsolete config.status UseCONFIG_HEADERS: Obsolete config.status UseCONFIG_LINKS: Obsolete config.status UseCONFIG_SHELL: config.status InvocationCONFIG_SITE: Site DefaultsCONFIG_STATUS: config.status InvocationCPP: C CompilerCPPFLAGS: Preset Output VariablesCXX: C++ CompilerCXXCPP: C++ CompilerCXXFLAGS: Preset Output VariablesCXXFLAGS: C++ CompilerCYGWIN: Obsolete MacrosDUALCASE: Special Shell VariablesENV: Special Shell VariablesERL: Erlang Compiler and InterpreterERLC: Erlang Compiler and InterpreterERLCFLAGS: Preset Output VariablesERLCFLAGS: Erlang Compiler and InterpreterF77: Fortran CompilerFC: Fortran CompilerFCFLAGS: Preset Output VariablesFCFLAGS: Fortran CompilerFFLAGS: Fortran CompilerFFLAGS: Preset Output VariablesFPATH: Special Shell VariablesGREP_OPTIONS: Special Shell VariablesIFS: Special Shell VariablesLANG: Special Shell VariablesLANGUAGE: Special Shell VariablesLC_ADDRESS: Special Shell VariablesLC_ALL: Initialization MacrosLC_ALL: Special Shell VariablesLC_COLLATE: Special Shell VariablesLC_CTYPE: Special Shell VariablesLC_IDENTIFICATION: Special Shell VariablesLC_MEASUREMENT: Special Shell VariablesLC_MESSAGES: Special Shell VariablesLC_MONETARY: Special Shell VariablesLC_NAME: Special Shell VariablesLC_NUMERIC: Special Shell VariablesLC_PAPER: Special Shell VariablesLC_TELEPHONE: Special Shell VariablesLC_TIME: Special Shell VariablesLDFLAGS: Preset Output VariablesLIBS: Preset Output VariablesLINENO: Initialization MacrosLINENO: Special Shell VariablesM4: autom4te InvocationMAIL: Special Shell VariablesMAILPATH: Special Shell VariablesNULLCMD: Special Shell VariablesOBJC: Objective C CompilerOBJCFLAGS: Objective C CompilerOBJCFLAGS: Preset Output VariablesOBJCPP: Objective C CompilerOBJCXX: Objective C++ CompilerOBJCXXCPP: Objective C++ CompilerOBJCXXFLAGS: Objective C++ CompilerOBJCXXFLAGS: Preset Output VariablesPATH_SEPARATOR: Special Shell VariablesPS1: Special Shell VariablesPS2: Special Shell VariablesPS4: Special Shell VariablesPWD: Special Shell VariablesRANDOM: Special Shell VariablesSHELL: Initialization MacrosSIMPLE_BACKUP_SUFFIX: autoupdate Invocationstatus: Special Shell VariablesWARNINGS: autoconf InvocationWARNINGS: autom4te InvocationWARNINGS: autoheader InvocationWARNINGS: autoreconf InvocationXMKMF: System ServicesYACC: Particular ProgramsYFLAGS: Particular Programs