Hello, I am building a cross compiler (linux 32 bits -> windows 32 bits). I have compiled: - binutils-2.22 - gcc-4.8.0 - w32api library But when I try to compile mingwrt library, I got an error: $ make Making `all' in `mingwex' make[1]: Entering directory `/home/yugiohjcj/documents/downloads/software/mingwrt-3.20-2-mingw32/mingwex' i686-pc-mingw32-gcc -c -g -O2 -Wall -fomit-frame-pointer -I. -I.. -I../include -nostdinc -iwithprefixbefore include -I ../../w32api/include ./math/hypotl.c -o hypotl.o ./math/hypotl.c: In function 'hypotl': ./math/hypotl.c:63:15: error: 'LDBL_MAX_EXP' undeclared (first use in this function) if (exx > LDBL_MAX_EXP) ^ ./math/hypotl.c:63:15: note: each undeclared identifier is reported only once for each function it appears in ./math/hypotl.c:68:13: error: 'LDBL_MIN_EXP' undeclared (first use in this function) if (exx < LDBL_MIN_EXP) ^ make[1]: *** [hypotl.o] Error 1 make[1]: Leaving directory `/home/yugiohjcj/documents/downloads/software/mingwrt-3.20-2-mingw32/mingwex' make: *** [mingwex] Error 2 What is this undeclared LDBL_MIN_EXP element? Thank you. Best regards.