Index: gcc-4.9.1/libstdc++-v3/configure.host =================================================================== --- gcc-4.9.1.orig/libstdc++-v3/configure.host +++ gcc-4.9.1/libstdc++-v3/configure.host @@ -264,6 +264,13 @@ case "${host_os}" in os_include_dir="os/bsd/freebsd" ;; gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) + # check for musl by target + case "${host_os}" in + *-musl*) + os_include_dir="os/generic" + ;; + *) + if [ "$uclibc" = "yes" ]; then os_include_dir="os/uclibc" elif [ "$bionic" = "yes" ]; then @@ -272,6 +279,9 @@ case "${host_os}" in os_include_dir="os/gnu-linux" fi ;; + + esac + ;; hpux*) os_include_dir="os/hpux" ;;