configure

   1 #!/bin/bash
   2
   3 # We don't support srcdir != builddir
   4 echo \#buildapi-variable-no-builddir > /dev/null
   5
   6 prefix=/usr
   7
   8 enable_documentation=yes
   9 enable_dracut_cpio=no
  10
  11 CC="${CC:-cc}"
  12 PKG_CONFIG="${PKG_CONFIG:-pkg-config}"
  13
  14 # Little helper function for reading args from the commandline.
  15 # it automatically handles -a b and -a=b variants, and returns 1 if
  16 # we need to shift $3.
  17 read_arg() {
  18     # $1 = arg name
  19     # $2 = arg value
  20     # $3 = arg parameter
  21     local rematch='^[^=]*=(.*)$'
  22     if [[ $2 =~ $rematch ]]; then
  23         read -r "$1" <<< "${BASH_REMATCH[1]}"
  24     else
  25         read -r "$1" <<< "$3"
  26         # There is no way to shift our callers args, so
  27         # return 1 to indicate they should do it instead.
  28         return 1
  29     fi
  30     return 0
  31 }
  32
  33 while (($# > 0)); do
  34     case "${1%%=*}" in
  35         --prefix) read_arg prefix "$@" || shift ;;
  36         --libdir) read_arg libdir "$@" || shift ;;
  37         --datadir) read_arg datadir "$@" || shift ;;
  38         --sysconfdir) read_arg sysconfdir "$@" || shift ;;
  39         --sbindir) read_arg sbindir "$@" || shift ;;
  40         --mandir) read_arg mandir "$@" || shift ;;
  41         --disable-documentation) enable_documentation=no ;;
  42         --program-prefix) read_arg programprefix "$@" || shift ;;
  43         --exec-prefix) read_arg execprefix "$@" || shift ;;
  44         --bindir) read_arg bindir "$@" || shift ;;
  45         --includedir) read_arg includedir "$@" || shift ;;
  46         --libexecdir) read_arg libexecdir "$@" || shift ;;
  47         --localstatedir) read_arg localstatedir "$@" || shift ;;
  48         --sharedstatedir) read_arg sharedstatedir "$@" || shift ;;
  49         --infodir) read_arg infodir "$@" || shift ;;
  50         --systemdsystemunitdir) read_arg systemdsystemunitdir "$@" || shift ;;
  51         --bashcompletiondir) read_arg bashcompletiondir "$@" || shift ;;
  52         --enable-dracut-cpio) enable_dracut_cpio=yes ;;
  53         *) echo "Ignoring unknown option '$1'" ;;
  54     esac
  55     shift
  56 done
  57
  58 if ! ${PKG_CONFIG} --exists --print-errors " libkmod >= 23 "; then
  59     echo "dracut needs pkg-config and libkmod >= 23." >&2
  60     exit 1
  61 fi
  62
  63 if ! command -v "${CC}" > /dev/null; then
  64     echo "dracut needs a C compiler (${CC} not found)." >&2
  65     exit 1
  66 fi
  67
  68 cat << EOF > conftest.c
  69 #include <fts.h>
  70 int main() {
  71         return 0;
  72 }
  73 EOF
  74
  75 # shellcheck disable=SC2086
  76 ${CC} $CFLAGS $LDFLAGS conftest.c > /dev/null 2>&1
  77 ret=$?
  78 rm -f conftest.c a.out
  79
  80 # musl doesn't have fts.h included
  81 if test $ret -ne 0; then
  82     echo "dracut needs fts development files." >&2
  83     exit 1
  84 fi
  85
  86 cat << EOF > conftest.c
  87 #include <fts.h>
  88 int main(void) {
  89         fts_open(0, 0, 0);
  90         return 0;
  91 }
  92 EOF
  93
  94 found=no
  95 for lib in "-lc" "-lfts"; do
  96     # shellcheck disable=SC2086
  97     ${CC} $CFLAGS $LDFLAGS conftest.c -Wl,$lib > /dev/null 2>&1
  98     ret=$?
  99     if test $ret -eq 0; then
 100         FTS_LIBS="$lib"
 101         found=yes
 102         break
 103     fi
 104 done
 105 rm -f conftest.c a.out
 106
 107 if test $found = no; then
 108     echo "dracut couldn't find usable fts library" >&2
 109     exit 1
 110 fi
 111
 112 cat << EOF > conftest.c
 113 #include <stdio.h>
 114 #include <unistd.h>
 115 #include <sys/syscall.h>
 116
 117 #ifndef SYS_gettid
 118 #error "SYS_gettid unavailable on this system"
 119 #endif
 120
 121 #define gettid()    ((pid_t) syscall(SYS_gettid))
 122
 123 int main(void) {
 124   return getpid() == gettid() ? 0 : -1;
 125 }
 126 EOF
 127
 128 # shellcheck disable=SC2086
 129 ${CC} $CFLAGS $LDFLAGS conftest.c > /dev/null 2>&1
 130 ret=$?
 131 rm -f conftest.c a.out
 132
 133 if test $ret -ne 0; then
 134     echo "dracut needs SYS_gettid support." >&2
 135     exit 1
 136 fi
 137
 138 if test "$enable_dracut_cpio" = "yes"; then
 139     cargo --version > /dev/null
 140     ret=$?
 141     if test $ret -ne 0; then
 142         echo "dracut couldn't find cargo for dracut-cpio build"
 143         exit 1
 144     fi
 145 fi
 146
 147 cat > Makefile.inc.$$ << EOF
 148 prefix ?= ${prefix}
 149 libdir ?= ${libdir:-${prefix}/lib}
 150 datadir ?= ${datadir:-${prefix}/share}
 151 sysconfdir ?= ${sysconfdir:-${prefix}/etc}
 152 sbindir ?= ${sbindir:-${prefix}/sbin}
 153 mandir ?= ${mandir:-${prefix}/share/man}
 154 enable_documentation ?= ${enable_documentation:-yes}
 155 enable_dracut_cpio ?= ${enable_dracut_cpio}
 156 bindir ?= ${bindir:-${prefix}/bin}
 157 KMOD_CFLAGS ?= $(${PKG_CONFIG} --cflags " libkmod >= 23 ")
 158 KMOD_LIBS ?= $(${PKG_CONFIG} --libs " libkmod >= 23 ")
 159 FTS_LIBS ?= ${FTS_LIBS}
 160 EOF
 161
 162 {
 163     [[ $programprefix ]] && echo "programprefix ?= ${programprefix}"
 164     [[ $execprefix ]] && echo "execprefix ?= ${execprefix}"
 165     [[ $includedir ]] && echo "includedir ?= ${includedir}"
 166     [[ $libexecdir ]] && echo "libexecdir ?= ${libexecdir}"
 167     [[ $localstatedir ]] && echo "localstatedir ?= ${localstatedir}"
 168     [[ $sharedstatedir ]] && echo "sharedstatedir ?= ${sharedstatedir}"
 169     [[ $infodir ]] && echo "infodir ?= ${infodir}"
 170     [[ $systemdsystemunitdir ]] && echo "systemdsystemunitdir ?= ${systemdsystemunitdir}"
 171     [[ $bashcompletiondir ]] && echo "bashcompletiondir ?= ${bashcompletiondir}"
 172 } >> Makefile.inc.$$
 173
 174 mv Makefile.inc.$$ Makefile.inc