dnl autoconf script for Infer
dnl run ./autogen.sh to generate a configure script
dnl
dnl Copyright (c) 2015 - present Facebook, Inc.
dnl All rights reserved.
dnl
dnl This source code is licensed under the BSD style license found in the
dnl LICENSE file in the root directory of this source tree. An additional grant
dnl of patent rights can be found in the PATENTS file in the same directory.

AC_PREREQ([2.63])

# WARNING: the version number has to be kept in sync with:
# - the values below
# - opam
# - docker/Dockerfile
AC_INIT([Infer],
        [0.9.2],
        [https://github.com/facebook/infer/issues/])

# this has to happen just after AC_INIT() because later macros may mess with the arguments passed to
# this script
config_flags="$*"

AC_CONFIG_SRCDIR([infer/src/IR/Sil.re])

# WARNING: keep in sync with above
INFER_MAJOR=0
INFER_MINOR=9
INFER_PATCH=2

AC_SUBST([INFER_MAJOR])
AC_SUBST([INFER_MINOR])
AC_SUBST([INFER_PATCH])

# are we in a release source tree
AC_CHECK_FILE([.release], [is_release_tree=yes], [is_release_tree=no])
IS_RELEASE_TREE=$is_release_tree
AC_SUBST([IS_RELEASE_TREE])

# are we in an internal source tree
AC_CHECK_FILE([.facebook], [is_facebook_tree=yes], [is_facebook_tree=no])
IS_FACEBOOK_TREE=$is_facebook_tree
AC_SUBST([IS_FACEBOOK_TREE])

# to compile the facebook-clang-plugins
AC_ARG_VAR([CLANG_PREFIX], [directory where clang is installed (defaults=$PWD/facebook-clang-plugins/clang/install)])
AS_IF([test "x$CLANG_PREFIX" = "x"], [
  CLANG_PREFIX="$(pwd)/facebook-clang-plugins/clang/install"
])

AC_ARG_VAR([CLANG_INCLUDES], [clang headers directories (defaults=$CLANG_PREFIX/include)])
AS_IF([test "x$CLANG_INCLUDES" = "x"], [
  CLANG_INCLUDES="$CLANG_PREFIX/include"
])


AC_ARG_ENABLE(c-analyzers,
  AS_HELP_STRING([--disable-c-analyzers],
    [do not build the C/C++/ObjC analyzers (default is to build them)]),
  ,
  enable_c_analyzers=yes)
BUILD_C_ANALYZERS=$enable_c_analyzers
AC_SUBST([BUILD_C_ANALYZERS])

AC_ARG_ENABLE(java-analyzers,
  AS_HELP_STRING([--disable-java-analyzers],
    [do not build the Java analyzers (default is to build them)]),
  ,
  enable_java_analyzers=yes)

BUILD_JAVA_ANALYZERS=$enable_java_analyzers
AC_SUBST([BUILD_JAVA_ANALYZERS])

AC_ARG_ENABLE(llvm-analyzers,
  AS_HELP_STRING([--enable-llvm-analyzers],
    [build the LLVM experimental analyzers (default is not to build them)]),
  ,
  enable_llvm_analyzers=no)
BUILD_LLVM_ANALYZERS=$enable_llvm_analyzers
AC_SUBST([BUILD_LLVM_ANALYZERS])

AC_ARG_WITH(fcp-clang,
  AS_HELP_STRING([--without-fcp-clang],
    [do not use $CLANG_PREFIX/bin/clang to override the default compiler (default is to override if in an infer release)]),
  ,
  with_fcp_clang=$is_release_tree)

AS_IF([test "x$enable_c_analyzers" = "xyes"], [
  AC_MSG_CHECKING([whether to use the compilers in $CLANG_PREFIX/bin])
  case "$with_fcp_clang" in
    no)
      AC_MSG_RESULT([no])
    ;;
    yes)
      CC=$CLANG_PREFIX/bin/clang
      CXX=$CLANG_PREFIX/bin/clang++
      OBJC=$CLANG_PREFIX/bin/clang
      AC_MSG_RESULT([yes])
    ;;
    *)
      AC_MSG_ERROR([invalid value for --without-fcp-clang; use "yes" or "no"])
    ;;
  esac

  AC_CHECK_TOOL([SHASUM], [shasum], [no])
  AC_ASSERT_PROG([shasum], [$SHASUM])
  # cmake is required to build llvm+clang
  AS_IF([test "x$is_release_tree" = "xno"], [
    AC_CHECK_TOOL([CMAKE], [cmake], [no])
    AC_ASSERT_PROG([cmake], [$CMAKE])
  ])
])
# end if($enable_c_analyzers)


AC_CHECK_TOOL([PYTHON27], [python2.7], [no])
AC_ASSERT_PROG([python2.7], [$PYTHON27])

AC_CHECK_TOOL([XCODE_SELECT], [xcode-select], [no])
AC_SUBST([XCODE_SELECT])


# prefer clang over gcc because the plugins makes use of
# clang-specific #pragma's
AC_PROG_CC(clang gcc)
AC_PROG_AWK
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P

if test "x$enable_c_analyzers" = "xyes"; then
  AC_PROG_CPP
  AC_PROG_CXX(clang++ g++)

  dnl clang wants either clang version >= 3.1 or gcc version >= 4.7.2 to
  dnl compile itself
  AC_MSG_CHECKING([if the C/C++ compiler is recent enough])
  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#ifdef __clang__
#if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 1)
#error compiler is too old
#endif // version check
#elif defined __GNUC__ // __clang__
#if __GNUC__ < 4 || (__GNUC__ == 4 && (__GNUC_MINOR__ < 7 || (__GNUC_MINOR__ == 7 && __GNUC_PATCHLEVEL__ < 2)))
#error compiler is too old
#endif // version check
#endif // __GNUC__
]])],
    [AC_MSG_RESULT([yes])],
    [dnl
      AC_MSG_RESULT([no])
      AC_MSG_ERROR([
Your C/C++ compiler seems to be too old to build clang, which is
required by the facebook-clang-plugins. Please install either
gcc version >= 4.7.2 or clang version >= 3.1.

See the output of `./configure --help` to force the use of a different
C compiler.

Alternatively, you can checkout a release of infer with clang
pre-compiled here:

  https://github.com/facebook/infer/releases/])
   ]
  )

  AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h locale.h malloc.h stddef.h stdint.h stdlib.h string.h sys/mount.h sys/param.h sys/socket.h sys/statfs.h sys/time.h unistd.h wchar.h wctype.h])
fi
# end if($enable_c_analyzers)


# OCaml dependencies
AC_PROG_OCAML
AC_ASSERT_PROG([ocamlc], [$OCAMLC])
# check the version of OCaml
AC_ASSERT_OCAML_MIN_VERSION([4.02.3])
AC_ASSERT_PROG([ocamlopt], [$OCAMLOPT])
AC_ASSERT_PROG([ocamlbuild], [$OCAMLBUILD])
AC_PROG_FINDLIB
AC_PROG_OCAMLLEX
AC_ASSERT_PROG([ocamllex], [$OCAMLLEX])
AC_PROG_OCAMLYACC
AC_ASSERT_PROG([ocamlyacc], [$OCAMLYACC])
AC_ASSERT_OCAML_PKG([atdgen], [], [1.6.0])
AC_ASSERT_OCAML_PKG([biniou])
AC_ASSERT_OCAML_PKG([camlzip], [zip])
AC_ASSERT_OCAML_PKG([easy-format])
AC_ASSERT_OCAML_PKG([extlib], [], [1.5.4])
AC_ASSERT_OCAML_PKG([oUnit], [], [2.0.0])
AC_ASSERT_OCAML_PKG([reason])
AC_ASSERT_OCAML_PKG([yojson])
# check for rebuild after checking for Reason since `rebuild` is normally provided by Reason. This
# way if Reason is missing we get a more helpful error message and not "rebuild not found".
AC_CHECK_TOOL([REBUILD], [rebuild], [no])
AC_ASSERT_PROG([rebuild], [$REBUILD])

if test "x$enable_java_analyzers" = "xyes"; then
  AC_CHECK_TOOL([JAVA], [java], [no])
  AC_CHECK_TOOL([JAVAC], [javac], [no])
  AC_ASSERT_PROG([javac], [$JAVAC])
  AC_ASSERT_PROG([java], [$JAVA])
  AC_ASSERT_OCAML_PKG([javalib], [], [2.3.1])
  AC_ASSERT_OCAML_PKG([sawja], [], [1.5.1])
  AC_ASSERT_OCAML_PKG([ptrees])

  AC_MSG_CHECKING([for JAVA_HOME])
  cat - <<_ACEOF >conftest.java
public class conftest {
  public static void main(String[[]] args) {
    System.out.println(System.getProperty("java.home"));
    System.exit(0);
  }
}
_ACEOF
  rm -f conftest.class
  if $JAVAC conftest.java; then
    rm -f conftest.java
    _USER_JAVA_HOME=$($JAVA -cp . conftest)
    if rm -f conftest.class; then
       USER_JAVA_HOME=$_USER_JAVA_HOME/..
    else
      AC_MSG_ERROR([Could not run test program with $JAVA])
    fi
  else
    rm -f conftest.java
    AC_MSG_ERROR([Could not compile test program with $JAVAC])
  fi
  AC_MSG_RESULT([$USER_JAVA_HOME])
  AC_SUBST([USER_JAVA_HOME])
fi


AC_CHECK_TOOL([ATDGEN], [atdgen], [no])
AC_ASSERT_PROG([atdgen], [$ATDGEN])
AC_SUBST([ATDGEN])

AC_ARG_ENABLE(ocaml-annot,
  AS_HELP_STRING([--disable-ocaml-annot], [do not build ocaml .annot files]),
  ,
  enable_ocaml_annot=yes)
ENABLE_OCAML_ANNOT=$enable_ocaml_annot
AC_SUBST([ENABLE_OCAML_ANNOT])

AC_ARG_ENABLE(ocaml-bin-annot,
  AS_HELP_STRING([--disable-ocaml-bin-annot], [do not build ocaml .cmt files]),
  ,
  enable_ocaml_bin_annot=yes)
ENABLE_OCAML_BINANNOT=$enable_ocaml_bin_annot
AC_SUBST([ENABLE_OCAML_BINANNOT])


# We use Buck to run the Infer tests
AC_MSG_CHECKING([which version of Buck to use])
buckversion_file=.buckversion
oss_buck_version=a965937ccdadf8119a98ab766c3feb0708dc424e
fb_buck_version=440619c312cf07951891083d8f02d05a713205b5
AS_IF([test x"$is_facebook_tree" = x"yes"],
  [buck_version=$fb_buck_version],
  [buck_version=$oss_buck_version])
echo $buck_version > "$buckversion_file"
AC_MSG_RESULT([$buck_version])


AC_CHECK_TOOL([GETCONF], [getconf], [no])
AC_MSG_CHECKING([the number of cpus the build host has])
if test "$GETCONF" != "no"; then
  if test $(getconf _NPROCESSORS_ONLN); then
    NCPU=$(getconf _NPROCESSORS_ONLN)
    AC_MSG_RESULT([$NCPU])
  fi
else
  NCPU=1
  AC_MSG_RESULT([failed, defaulting to 1])
fi
AC_SUBST([NCPU])


AC_CONFIG_FILES([
  Makefile.config
])

AC_MSG_NOTICE([saving configure flags to ./config.flags])
echo $config_flags > config.flags

AC_OUTPUT