qt5base-lts/config.tests/unix/precomp.test

#!/bin/sh

PRECOMP_SUPPORT=no
COMPILER=$1
VERBOSE=$2

case "$COMPILER" in
icpc)
    cat >header.h <<EOF
#define HEADER_H

EOF
    >header.cpp
    cat >source.cpp <<EOF
#ifndef HEADER_H
#error no go
#endif

EOF

    rm -f header.pchi
    $COMPILER -pch-create header.pchi -include header.h -c header.cpp -o header.o >/dev/null 2>&1 \
        && $COMPILER -pch-use header.pchi -include header.h -c source.cpp -o source.o >/dev/null 2>&1 \
        && PRECOMP_SUPPORT=yes

    rm -f header.h header.cpp source.cpp
    rm -f header.pchi header.o source.o
    ;;

*g++*|c++|*qcc*)
    case `"$COMPILER" -dumpversion 2>/dev/null` in
    3.*)
        ;;
    *)

        >precomp_header.h
        if $COMPILER -x c-header precomp_header.h >/dev/null 2>&1; then
           $COMPILER -x c++-header precomp_header.h && PRECOMP_SUPPORT=yes
        fi
        rm -f precomp_header.h precomp_header.h.gch
        ;;
    esac
    ;;
esac


# done
if [ "$PRECOMP_SUPPORT" != "yes" ]; then
    [ "$VERBOSE" = "yes" ] && echo "Precompiled-headers support disabled."
    exit 0
else
    [ "$VERBOSE" = "yes" ] && echo "Precompiled-headers support enabled."
    exit 1
fi