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build: add m4 macros for --enable-lto and --enable-ld-gc

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This commit is contained in:
Thomas Haller 2017-02-10 11:28:01 +01:00
parent 8bc88bcc7c
commit a981c6c355
2 changed files with 29 additions and 21 deletions
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23
configure.ac
View file

@ -1010,27 +1010,8 @@ if test "${enable_more_logging}" = "yes"; then
AC_DEFINE(NM_MORE_LOGGING, [1], [Define if more debug logging is enabled])
fi
AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto], [Enable Link Time Optimization for smaller size (default: no)]))
if (test "${enable_lto}" = "yes"); then
CFLAGS="-flto $CFLAGS"
else
enable_lto='no'
fi
AC_ARG_ENABLE(ld-gc, AS_HELP_STRING([--enable-ld-gc], [Enable garbage collection of unused symbols on linking (default: auto)]))
if (test "${enable_ld_gc}" != "no"); then
CC_CHECK_FLAG_APPEND([ld_gc_flags], [CFLAGS], [-fdata-sections -ffunction-sections -Wl,--gc-sections])
if (test -n "${ld_gc_flags}"); then
enable_ld_gc="yes"
CFLAGS="$CFLAGS $ld_gc_flags"
else
if (test "${enable_ld_gc}" = "yes"); then
AC_MSG_ERROR([Unused symbol eviction requested but not supported.])
else
enable_ld_gc="no"
fi
fi
fi
NM_LTO
NM_LD_GC
AC_ARG_ENABLE(address-sanitizer, AS_HELP_STRING([--enable-address-sanitizer],
[Compile with address sanitizer (default: no)]))

27
m4/compiler_options.m4
View file

@ -124,3 +124,30 @@ else
AC_MSG_RESULT(no)
fi
])
AC_DEFUN([NM_LTO],
[AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto], [Enable Link Time Optimization for smaller size (default: no)]))
if (test "${enable_lto}" = "yes"); then
CFLAGS="-flto $CFLAGS"
else
enable_lto='no'
fi
])
AC_DEFUN([NM_LD_GC],
[AC_ARG_ENABLE(ld-gc, AS_HELP_STRING([--enable-ld-gc], [Enable garbage collection of unused symbols on linking (default: auto)]))
if (test "${enable_ld_gc}" != "no"); then
CC_CHECK_FLAG_APPEND([ld_gc_flags], [CFLAGS], [-fdata-sections -ffunction-sections -Wl,--gc-sections])
if (test -n "${ld_gc_flags}"); then
enable_ld_gc="yes"
CFLAGS="$CFLAGS $ld_gc_flags"
else
if (test "${enable_ld_gc}" = "yes"); then
AC_MSG_ERROR([Unused symbol eviction requested but not supported.])
else
enable_ld_gc="no"
fi
fi
fi
])