configure.ac

AC_INIT([ugrep],[7.1.1],[https://github.com/Genivia/ugrep/issues],[ugrep],[https://ugrep.com])
AM_INIT_AUTOMAKE([foreign subdir-objects dist-xz no-dist-gzip])
AC_CONFIG_HEADERS([config.h])
AC_COPYRIGHT([Copyright (C) 2019-2024 Robert van Engelen, Genivia Inc.])

AC_CONFIG_MACRO_DIR([m4])

# if CXXFLAGS is undefined, set it to our preferred default flags
: ${CXXFLAGS="-Wall -Wextra -Wunused -O2"}
: ${CFLAGS="-Wall -Wextra -Wunused -O2"}

AC_LANG([C++])
AX_CXX_COMPILE_STDCXX([11],[ext],[mandatory])

AC_HEADER_DIRENT
AC_STRUCT_DIRENT_D_INO
AC_STRUCT_DIRENT_D_TYPE

AC_FUNC_MMAP

AC_CHECK_HEADERS([sys/time.h sys/statvfs.h sys/param.h sys/mount.h sys/cpuset.h sys/resource.h sched.h])

AC_CHECK_FUNCS([statfs statvfs])

AX_PTHREAD

# Check how thread affinity is set
save_LIBS=$LIBS
save_CFLAGS=$CFLAGS
LIBS=$PTHREAD_LIBS
CFLAGS=$PTHREAD_CFLAGS
AC_CHECK_FUNCS([sched_setaffinity cpuset_setaffinity pthread_setaffinity_np pthread_setschedprio setpriority],[break])
LIBS=$save_LIBS
CFLAGS=$save_CFLAGS

AC_CHECK_MEMBERS([struct stat.st_atim, struct stat.st_mtim, struct stat.st_ctim])
AC_CHECK_MEMBERS([struct stat.st_atimespec, struct stat.st_mtimespec, struct stat.st_ctimespec])

AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T

AC_PROG_CXX
AM_PROG_AR
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_SED

PKG_PROG_PKG_CONFIG

AC_CANONICAL_HOST

PLATFORM=${host}
AC_SUBST(PLATFORM)

################################################################################
# Use SIMD CPU extensions and manage cross compilation
################################################################################

# --disable-sse2 fallback option if cross compilation fails to disable SSE2 CPU extensions
AC_ARG_ENABLE(sse2,
  [AS_HELP_STRING([--disable-sse2],
                  [disable SSE2 CPU extensions])],
  [with_no_sse2="yes"],
  [with_no_sse2="no"])

# --disable-avx2 fallback option if cross compilation fails to disable AVX2/AVX512BW CPU extensions
AC_ARG_ENABLE(avx2,
  [AS_HELP_STRING([--disable-avx2],
                  [disable AVX2/AVX512BW CPU extensions])],
  [with_no_avx2="yes"],
  [with_no_avx2="no"])

# --disable-neon fallback option if cross compilation fails to disable NEON/AArch64 CPU extensions
AC_ARG_ENABLE(neon,
  [AS_HELP_STRING([--disable-neon],
                 [disable NEON CPU extensions])],
  [with_no_neon="yes"],
  [with_no_neon="no"])

# SIMD_FLAGS applies to all source code
SIMD_FLAGS=
# SIMD_AVX2_FLAGS only applies to lib/matcher_avx2.cpp which is selected based on a runtime AVX2 check
SIMD_AVX2_FLAGS=
# SIMD_AVX512BW_FLAGS only applies to lib/matcher_avx512bw.cpp which is selected based on a runtime AVX512BW check
SIMD_AVX512BW_FLAGS=

if test "x$cross_compiling" = "xyes"; then

  # cross compiling to a host CPU: check support for SIMD CPU extension compile flags
  case $host_cpu in
    i[[3456]]86*|x86_64*|amd64*)
      # enable SSE2/AVX2/AVX512BW extensions
      if ! test "x$with_no_sse2" = "xyes"; then
        AC_MSG_CHECKING([whether ${CXX} supports SSE2 intrinsics])
        save_CXXFLAGS=$CXXFLAGS
        CXXFLAGS="-msse2"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <emmintrin.h>]], [[__m128i n = _mm_set1_epi8(42);]])],
                          [msse2_ok=yes],
                          [msse2_ok=no])
        CXXFLAGS=$save_CXXFLAGS
        AC_MSG_RESULT($msse2_ok)
        if test "x$msse2_ok" = "xyes"; then
          SIMD_FLAGS="-msse2 -DHAVE_SSE2"
          if ! test "x$with_no_avx2" = "xyes"; then
            AC_MSG_CHECKING([whether ${CXX} supports AVX2/AVX512BW intrinsics])
            save_CXXFLAGS=$CXXFLAGS
            CXXFLAGS="-mavx512bw"
            AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]], [[__m512i n = _mm512_set1_epi8(42); (void)_mm512_cmpeq_epi8_mask(n, n);]])],
                              [mavx_ok=yes],
                              [mavx_ok=no])
            if test "x$mavx_ok" = "xyes"; then
              SIMD_FLAGS="-msse2 -DHAVE_AVX512BW"
              SIMD_AVX2_FLAGS="-mavx2"
              SIMD_AVX512BW_FLAGS="-mavx512bw"
            else
              CXXFLAGS="-mavx2"
              AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]], [[__m256i n = _mm256_set1_epi8(42); (void)_mm256_movemask_epi8(_mm256_and_si256(n, n));]])],
                                [mavx_ok=yes],
                                [mavx_ok=no])
              if test "x$mavx_ok" = "xyes"; then
                SIMD_FLAGS="-msse2 -DHAVE_AVX2"
                SIMD_AVX2_FLAGS="-mavx2"
              fi
            fi
            CXXFLAGS=$save_CXXFLAGS
            AC_MSG_RESULT($mavx_ok)
          fi
        fi
      fi
    ;;
    armv5*|armv6*)
    ;;
    arm*)
      # enable arm >= 7 neon extensions with option -mfpu=neon
      if ! test "x$with_no_neon" = "xyes"; then
        AC_MSG_CHECKING([whether ${CXX} supports ARM NEON/AArch64 intrinsics])
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <arm_neon.h>]], [[uint64x2_t n; uint64_t m = vgetq_lane_u64(n, 0);]])],
                          [mneon_ok=yes],
                          [mneon_ok=no])
        if test "x$mneon_ok" = "xyes"; then
          SIMD_FLAGS="-DHAVE_NEON"
        else
          save_CXXFLAGS=$CXXFLAGS
          CXXFLAGS="-mfpu=neon"
          AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <arm_neon.h>]], [[uint64x2_t n; uint64_t m = vgetq_lane_u64(n, 0);]])],
                            [mneon_ok=yes],
                            [mneon_ok=no])
          if test "x$mneon_ok" = "xyes"; then
            SIMD_FLAGS="-mfpu=neon -DHAVE_NEON"
          else
            # this part is a bit iffy,,,
            CXXFLAGS="-march=native -mfpu=neon"
            AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <arm_neon.h>]], [[uint64x2_t n; uint64_t m = vgetq_lane_u64(n, 0);]])],
                              [mneon_ok=yes],
                              [mneon_ok=no])
            if test "x$mneon_ok" = "xyes"; then
              SIMD_FLAGS="-march=native -mfpu=neon -DHAVE_NEON"
            fi
          fi
          CXXFLAGS=$save_CXXFLAGS
        fi
        AC_MSG_RESULT($mneon_ok)
      fi
    ;;
    aarch64*)
      # enable AArch64 neon extensions
      if ! test "x$with_no_neon" = "xyes"; then
        SIMD_FLAGS="-DHAVE_NEON"
      fi
    ;;
  esac

else

  if ! test "x$with_no_sse2" = "xyes"; then
    AC_MSG_CHECKING([whether ${CXX} supports SSE2 intrinsics])
    save_CXXFLAGS=$CXXFLAGS
    CXXFLAGS="-msse2"
    AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <emmintrin.h>]],[[__m128i n = _mm_set1_epi8(42);]])],
                  [msse2_ok=yes],
                  [msse2_ok=no])
    CXXFLAGS=$save_CXXFLAGS
    AC_MSG_RESULT($msse2_ok)
    if test "x$msse2_ok" = "xyes"; then
      SIMD_FLAGS="-msse2 -DHAVE_SSE2"
      AC_MSG_CHECKING(for --disable-avx)
      if ! test "x$with_no_avx2" = "xyes"; then
        AC_MSG_RESULT(no)
        AC_MSG_CHECKING([whether ${CXX} supports AVX2/AVX512BW intrinsics])
        save_CXXFLAGS=$CXXFLAGS
        CXXFLAGS="-mavx512bw"
        AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]],[[__m512i n = _mm512_set1_epi8(42); (void)_mm512_cmpeq_epi8_mask(n, n);]])],
                      [mavx_ok=yes],
                      [mavx_ok=no])
        if test "x$mavx_ok" = "xyes"; then
          SIMD_FLAGS="-msse2 -DHAVE_AVX512BW"
          SIMD_AVX2_FLAGS="-mavx2"
          SIMD_AVX512BW_FLAGS="-mavx512bw"
        else
          CXXFLAGS="-mavx2"
          AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]],[[__m256i n = _mm256_set1_epi8(42); (void)_mm256_movemask_epi8(_mm256_and_si256(n, n));]])],
                        [mavx_ok=yes],
                        [mavx_ok=no])
          if test "x$mavx_ok" = "xyes"; then
            SIMD_FLAGS="-msse2 -DHAVE_AVX2"
            SIMD_AVX2_FLAGS="-mavx2"
          fi
        fi
        CXXFLAGS=$save_CXXFLAGS
        AC_MSG_RESULT($mavx_ok)
      else
        AC_MSG_RESULT(yes)
      fi
    fi
  fi

  if test -z "$SIMD_FLAGS"; then
    if ! test "x$with_no_neon" = "xyes"; then
      AC_MSG_CHECKING([whether ${CXX} supports NEON/AArch64 intrinsics])
      AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <arm_neon.h>]],[[uint64x2_t n; uint64_t m = vgetq_lane_u64(n, 0);]])],
                    [mneon_ok=yes],
                    [mneon_ok=no])
      if test "x$mneon_ok" = "xyes"; then
        SIMD_FLAGS="-DHAVE_NEON"
      else
        save_CXXFLAGS=$CXXFLAGS
        CXXFLAGS="-mfpu=neon"
        AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <arm_neon.h>]],[[uint64x2_t n; uint64_t m = vgetq_lane_u64(n, 0);]])],
                      [mneon_ok=yes],
                      [mneon_ok=no])
        if test "x$mneon_ok" = "xyes"; then
          SIMD_FLAGS="-mfpu=neon -DHAVE_NEON"
        else
          CXXFLAGS="-march=native -mfpu=neon"
          AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <arm_neon.h>]],[[uint64x2_t n; uint64_t m = vgetq_lane_u64(n, 0);]])],
                        [mneon_ok=yes],
                        [mneon_ok=no])
          if test "x$mneon_ok" = "xyes"; then
            SIMD_FLAGS="-march=native -mfpu=neon -DHAVE_NEON"
          fi
        fi
        CXXFLAGS=$save_CXXFLAGS
      fi
      AC_MSG_RESULT($mneon_ok)
    fi
  fi

fi

AC_SUBST(SIMD_FLAGS)
AC_SUBST(SIMD_AVX2_FLAGS)
AC_SUBST(SIMD_AVX512BW_FLAGS)

################################################################################
# Extra open() flags
################################################################################

# F_RDAHEAD fcntl()
AC_MSG_CHECKING(for F_RDAHEAD fcntl)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fcntl.h>
]],[[ int cmd = F_RDAHEAD; ]])],[
  AC_DEFINE(HAVE_F_RDAHEAD,1,[ Define if F_RDAHEAD fcntl() is supported])
  AC_MSG_RESULT(yes)
],[
  AC_MSG_RESULT(no)
])

# O_NOATIME open flag
AC_MSG_CHECKING(for O_NOATIME open flag)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fcntl.h>
]],[[ int cmd = O_NOATIME; ]])],[
  AC_DEFINE(HAVE_O_NOATIME,1,[ Define if O_NOATIME open flag is supported])
  AC_MSG_RESULT(yes)
],[
  AC_MSG_RESULT(no)
])

################################################################################
# PCRE2 or Boost Regex
################################################################################

AX_CHECK_PCRE2([8], [], [echo "recommended PCRE2 library not found: checking for Boost.Regex"])

if test "x$pcre2_cv_libpcre2" != "xyes" || test "x$pcre2_cv_pcre2_h" != "xyes"; then
  # PCRE2 was not found: check for alternative Boost Regex library and header
  AX_BOOST_REGEX
  AC_DEFINE([BOOST_REGEX_STANDALONE],[1],[Signal to boost lib that it is being used without the rest of boost])
fi

################################################################################
# Compression libraries
################################################################################

AX_CHECK_ZLIB([], [echo "recommended zlib not found: ugrep option -z is disabled"])

if test -n "${zlib_places}"; then

AX_CHECK_BZ2LIB([], [echo "recommended libbz2 not found: ugrep option -z cannot search .bz and .bz2 files"])

AX_CHECK_LZMALIB([], [echo "recommended liblzma not found: ugrep option -z cannot search .lzma and .xz files"])

AX_CHECK_LZ4LIB([], [echo "optional liblz4 not found: install if you want ugrep option -z to search .lz4 files"])

AX_CHECK_ZSTDLIB([], [echo "optional libzstd not found: install if you want ugrep option -z to search .zst files"])

AX_CHECK_BROTLILIB([], [echo "optional brotli library not found: install if you want ugrep option -z to search .br files"])

AC_ARG_WITH(bzip3,
  [AS_HELP_STRING([--with-bzip3],
                  [to enable bzip3 library to decompress .bz3 files])],
  [with_bzip3_library="$withval"],
  [with_bzip3_library=""])
if test "x$with_bzip3_library" != "x"; then
  if test "x$with_bzip3" = "xyes"; then
    unset with_bzip3
  fi
  AX_CHECK_BZIP3LIB([], [echo "optional libbzip3 not found: install if you want ugrep option -z to search .bz3 files"])
fi

AC_ARG_ENABLE(7zip,
  [AS_HELP_STRING([--disable-7zip],
                  [to disable 7zip and no longer search .7z files (7z requires more memory and takes long to decompress)])],
  [with_7zip="$enableval"],
  [with_7zip="yes"])
AC_MSG_CHECKING(for --disable-7zip)
if test "x$with_7zip" = "xyes"; then
  AC_MSG_RESULT(no)
  CPPFLAGS="$CPPFLAGS -I../lzma/C"
  LDFLAGS="$LDFLAGS -L../lzma/C"
  LIBS="-lviiz $LIBS"
  AC_DEFINE(HAVE_7ZIP,1,[ Define if built with 7ZIP support])
else
  EXTRA_CFLAGS="-DWITH_NO_7ZIP ${EXTRA_CFLAGS}"
  AC_MSG_RESULT(yes)
fi

fi
AM_CONDITIONAL([ENABLE_7ZIP],[test "x$with_7zip" = "xyes"])

################################################################################
# Completions
################################################################################

AC_ARG_WITH([bash-completion-dir],
  [AS_HELP_STRING([--with-bash-completion-dir[=PATH]],
                  [install the bash auto-completion script in this directory. @<:@default=yes@:>@])],
  [with_bash_completion_dir="$withval"],
  [with_bash_completion_dir="yes"])
if test "x$with_bash_completion_dir" = "xyes"; then
  PKG_CHECK_MODULES([BASH_COMPLETION],
                    [bash-completion >= 2.0],
                    [BASH_COMPLETION_DIR="`pkg-config --define-variable=datadir=$datadir --variable=completionsdir bash-completion`"],
                    [BASH_COMPLETION_DIR="$datadir/bash-completion/completions"])
else
  BASH_COMPLETION_DIR="$with_bash_completion_dir"
fi
AC_SUBST(BASH_COMPLETION_DIR)
AM_CONDITIONAL([ENABLE_BASH_COMPLETION],[test "x$with_bash_completion_dir" != "xno"])

AC_ARG_WITH([fish-completion-dir],
  [AS_HELP_STRING([--with-fish-completion-dir[=PATH]],
                  [install the fish auto-completion script in this directory. @<:@default=yes@:>@])],
  [with_fish_completion_dir="$withval"],
  [with_fish_completion_dir="yes"])
if test "x$with_fish_completion_dir" = "xyes"; then
  PKG_CHECK_MODULES([FISH_COMPLETION],
                    [fish >= 3.0],
                    [FISH_COMPLETION_DIR="`pkg-config --define-variable=datadir=$datadir --variable=completionsdir fish`"],
                    [FISH_COMPLETION_DIR="$datadir/fish/vendor_completions.d"])
else
  FISH_COMPLETION_DIR="$with_fish_completion_dir"
fi
AC_SUBST(FISH_COMPLETION_DIR)
AM_CONDITIONAL([ENABLE_FISH_COMPLETION],[test "x$with_fish_completion_dir" != "xno"])

AC_ARG_WITH([zsh-completion-dir],
  [AS_HELP_STRING([--with-zsh-completion-dir[=PATH]],
                  [install the zsh auto-completion script in this directory. @<:@default=yes@:>@])],
  [with_zsh_completion_dir="$withval"],
  [with_zsh_completion_dir="yes"])
if test "x$with_zsh_completion_dir" = "xyes"; then
  ZSH_COMPLETION_DIR="$datadir/zsh/site-functions"
else
  ZSH_COMPLETION_DIR="$with_zsh_completion_dir"
fi
AC_SUBST(ZSH_COMPLETION_DIR)
AM_CONDITIONAL([ENABLE_ZSH_COMPLETION],[test "x$with_zsh_completion_dir" != "xno"])

################################################################################
# Static or dynamic (default) linking
################################################################################

AC_ARG_ENABLE(static,
  [AS_HELP_STRING([--enable-static],
                  [build static ugrep binaries])],
              [enable_static=$enableval],
              [enable_static=no])
AC_MSG_CHECKING(for --enable-static)
if test "x$enable_static" = "xyes"; then
  CFLAGS="$CFLAGS -static"
  LDFLAGS="$LDFLAGS -static"
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

################################################################################
# Installation preferences
################################################################################

AC_ARG_WITH(grep-path,
  [AS_HELP_STRING([--with-grep-path=GREP_PATH],
                  [specifies the GREP_PATH if different than the default DATAROOTDIR/ugrep/patterns])],
  [with_grep_path="$withval"],
  [with_grep_path=""])
AC_MSG_CHECKING(for --with-grep-path)
if test "x$with_grep_path" != "x"; then
  GREP_PATH="$with_grep_path"
  AC_MSG_RESULT("$with_grep_path")
else
  AC_MSG_RESULT()
  GREP_PATH="${datadir}/ugrep/patterns"
fi
AC_SUBST(GREP_PATH)

AC_ARG_WITH(grep-colors,
  [AS_HELP_STRING([--with-grep-colors="GREP_COLORS"],
                  [specifies the default ANSI SGR color parameters when variable GREP_COLORS is undefined])],
  [with_grep_colors="$withval"],
  [with_grep_colors=""])
AC_MSG_CHECKING(for --with-grep-colors)
if test "x$with_grep_colors" != "x"; then
  AC_MSG_RESULT("$with_grep_colors")
  EXTRA_CFLAGS="-DDEFAULT_GREP_COLORS=\"\\\"$with_grep_colors\\\"\" ${EXTRA_CFLAGS}"
else
  AC_MSG_RESULT()
fi

AC_ARG_ENABLE(auto-color,
  [AS_HELP_STRING([--disable-auto-color],
                  [disable automatic colors, otherwise colors are enabled by default])],
  [with_no_auto_color="yes"],
  [with_no_auto_color="no"])
AC_MSG_CHECKING(for --disable-auto-color)
if test "x$with_no_auto_color" = "xno"; then
  AC_MSG_RESULT(no)
  EXTRA_CFLAGS="-DWITH_COLOR ${EXTRA_CFLAGS}"
else
  AC_MSG_RESULT(yes)
fi

AC_ARG_ENABLE(color,
  [AS_HELP_STRING([--enable-color],
                  [deprecated, use --disable-auto-color])],
  [],
  [])
AC_MSG_CHECKING(for --enable-color)
if test "x$with_no_auto_color" = "xno"; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

AC_ARG_ENABLE(pretty,
  [AS_HELP_STRING([--enable-pretty],
                  [enable pretty output by default without requiring ugrep flag --pretty])],
  [with_pretty="$enable_pretty"],
  [with_pretty="no"])
AC_MSG_CHECKING(for --enable-pretty)
if test "x$with_pretty" = "xyes"; then
  AC_MSG_RESULT(yes)
  EXTRA_CFLAGS="-DWITH_PRETTY ${EXTRA_CFLAGS}"
else
  AC_MSG_RESULT(no)
fi

AC_ARG_ENABLE(pager,
  [AS_HELP_STRING([--enable-pager],
                  [enable the pager by default without requiring ugrep flag --pager])],
  [with_pager="$enable_pager"],
  [with_pager="no"])
AC_MSG_CHECKING(for --enable-pager)
if test "x$with_pager" = "xyes"; then
  AC_MSG_RESULT(yes)
  EXTRA_CFLAGS="-DWITH_PAGER ${EXTRA_CFLAGS}"
else
  AC_MSG_RESULT(no)
fi

AC_ARG_ENABLE(hidden,
  [AS_HELP_STRING([--enable-hidden],
                  [enable searching hidden files and directories by default unless explicitly disabled with ugrep flag --no-hidden])],
  [with_hidden="$enable_hidden"],
  [with_hidden="no"])
AC_MSG_CHECKING(for --enable-hidden)
if test "x$with_hidden" = "xno"; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  EXTRA_CFLAGS="-DWITH_HIDDEN ${EXTRA_CFLAGS}"
fi

AC_ARG_ENABLE(mmap,
  [AS_HELP_STRING([--disable-mmap],
                  [disable memory mapped files unless explicitly enabled with --mmap])],
  [with_no_mmap="yes"],
  [with_no_mmap="no"])
AC_MSG_CHECKING(for --disable-mmap)
if test "x$with_no_mmap" = "xno"; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  EXTRA_CFLAGS="-DWITH_NO_MMAP ${EXTRA_CFLAGS}"
fi

AC_SUBST(EXTRA_CFLAGS)

# Allow the manpage to be accessed as either ug or ugrep
AC_CONFIG_LINKS([man/ug.1:man/ugrep.1])

AC_CONFIG_FILES([Makefile lib/Makefile src/Makefile lzma/C/Makefile])

AC_OUTPUT