[source]
tar = "https://ftp.gnu.org/gnu/m4/m4-1.14.21.tar.xz"
patches = ["redox.patch"]

[build]
template = "custom"
script = """
DYNAMIC_INIT

# Add relibc system headers to the include path.
# The cookbook sets CPPFLAGS="-I${COOKBOOK_SYSROOT}/include" but the recipe
# sysroot is empty for packages with no header-providing deps. The relibc
# headers are at prefix/${TARGET}/relibc-install/${TARGET}/include/ — not in
# the compiler's default search path. Without this, gnulib's #include_next
# can't find the system headers and every wrapper fails.
RELIBC_INCLUDE="${COOKBOOK_ROOT}/prefix/${TARGET}/relibc-install/${TARGET}/include"
export CPPFLAGS="${CPPFLAGS} -isystem ${RELIBC_INCLUDE}"

# relibc's float.h is missing LDBL_DIG (and possibly other LDBL_* macros).
# For x86_64 80-bit extended precision: LDBL_DIG = floor(63 * log10(2)) = 18
export CPPFLAGS="${CPPFLAGS} -DLDBL_DIG=18"

# The redoxer toolchain has a stale libc without __fseterr/__freadahead.
# Add the relibc library path so the linker finds the updated library.
RELIBC_LIB="${COOKBOOK_ROOT}/prefix/${TARGET}/relibc-install/${TARGET}/lib"
export LDFLAGS="${LDFLAGS} -L${RELIBC_LIB}"

# Gnulib cross-compilation: relibc provides standard POSIX headers and types
# but gnulib's configure can't run test programs during cross-compilation.
export ac_cv_header_stdio_h=yes
export ac_cv_header_stdlib_h=yes
export ac_cv_header_string_h=yes
export ac_cv_header_strings_h=yes
export ac_cv_header_inttypes_h=yes
export ac_cv_header_stdint_h=yes
export ac_cv_header_unistd_h=yes
export ac_cv_header_sys_types_h=yes
export ac_cv_header_sys_stat_h=yes
export ac_cv_header_time_h=yes
export ac_cv_header_sys_time_h=yes
export ac_cv_header_sys_select_h=yes
export ac_cv_header_wchar_h=yes
export ac_cv_header_wctype_h=yes
export ac_cv_header_signal_h=yes
export ac_cv_header_dirent_h=yes
export ac_cv_header_fcntl_h=yes
export ac_cv_header_locale_h=yes
export ac_cv_header_errno_h=yes
export ac_cv_header_ctype_h=yes
export ac_cv_header_limits_h=yes
export ac_cv_header_stdarg_h=yes
export ac_cv_header_stddef_h=yes
export ac_cv_header_spawn_h=yes

# Standard types
export ac_cv_type_intmax_t=yes
export ac_cv_type_uintmax_t=yes
export ac_cv_type_gid_t=yes
export ac_cv_type_uid_t=yes
export ac_cv_type_pid_t=yes
export ac_cv_type_mode_t=yes
export ac_cv_type_off_t=yes
export ac_cv_type_size_t=yes
export ac_cv_type_ssize_t=yes
export ac_cv_type_ptrdiff_t=yes
export ac_cv_type_nlink_t=yes
export ac_cv_type_mbstate_t=yes
export ac_cv_type_sigset_t=yes
export ac_cv_type_posix_spawnattr_t=yes
export ac_cv_type_posix_spawn_file_actions_t=yes
export gl_cv_type_intmax_t=yes
export gl_cv_type_ptrdiff_t_signed=yes
export gl_cv_header_inttypes_h=yes
export gl_cv_header_stdint_h=yes
export gl_cv_header_inttypes_h_with_uintmax=yes
export ac_cv_have_inttypes_h_with_uintmax=yes

# m4-specific gnulib function checks
export ac_cv_func___freadahead=yes
export ac_cv_have_decl___freadahead=yes
export gl_cv_header_wchar_h_correct_inline=yes
export gl_cv_func_btowc_nul=yes
export gl_cv_func_btowc_consistent=yes
export gl_cv_onwards_func___freadahead=yes
export gl_cv_socklen_t_equiv=socklen_t
export ac_cv_func_getpagesize=yes
export ac_cv_func_memcmp_working=yes

# Tell gnulib these wide-char functions exist and work
export ac_cv_func_btowc=yes
export ac_cv_func_mbrtowc=yes
export ac_cv_func_mbsinit=yes
export ac_cv_func_wcrtomb=yes
export ac_cv_func_wctob=yes
export ac_cv_func_mbsrtowcs=yes
export ac_cv_func_wcswidth=yes
export ac_cv_func_wcwidth=yes
export gl_cv_func_btowc=yes
export gl_cv_func_mbrtowc=yes
export gl_cv_func_mbsinit=yes
export gl_cv_func_wcrtomb=yes
export gl_cv_func_wctob=yes
export gl_cv_func_wcwidth=yes
export gl_cv_func_wcswidth=yes

# Functions that relibc provides but gnulib can't detect during cross-compilation
export ac_cv_func___fseterr=yes
export ac_cv_func_getlocalename_l=yes

COOKBOOK_CONFIGURE_FLAGS+=(
    --disable-nls
)

"${COOKBOOK_CONFIGURE}" "${COOKBOOK_CONFIGURE_FLAGS[@]}"

# Fix gnulib cross-compilation misdetections in config.h
"${COOKBOOK_ROOT}/local/scripts/gnulib-cross-fix.sh" "${COOKBOOK_BUILD}/lib/config.h"

# Prevent man page regeneration (help2man not available in cross-env)
touch "${COOKBOOK_SOURCE}/doc/m4.1"

"${COOKBOOK_MAKE}" -j "${COOKBOOK_MAKE_JOBS}" HELP2MAN=true
"${COOKBOOK_MAKE}" install DESTDIR="${COOKBOOK_STAGE}" HELP2MAN=true
"""

[package]
description = "GNU M4 macro processor"