文件操作 - ax_switch_flags.m4
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文件: /usr/share/aclocal/ax_switch_flags.m4
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# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_switch_flags.html # =========================================================================== # # SYNOPSIS # # AX_SWITCH_FLAGS(newnamespace,[oldnamespace]) # # DESCRIPTION # # Switch common compilation flags from temporary variables between two # compilation namespace. # # Compilation flags includes: CPPFLAGS, CFLAGS, CXXFLAGS, LDFLAGS, LIBS, # OBJCFLAGS. # # By default these flags are restored to a global (empty) namespace, but # user could restore from specific NAMESPACE by using # AX_RESTORE_FLAGS(NAMESPACE) macro. # # Typical usage is like: # # AX_SAVE_FLAGS(beginprogram) # CPPFLAGS="-Imypackagespath ${CPPFLAGS}" # AX_SWITCH_FLAGS(mypackage,beginprogram) # # LICENSE # # Copyright (c) 2009 Filippo Giunchedi <filippo@esaurito.net> # Copyright (c) 2011 The Board of Trustees of the Leland Stanford Junior University # Copyright (c) 2011 Russ Allbery <rra@stanford.edu> # Copyright (c) 2013 Bastien ROUCARIES <roucaries.bastien+autoconf@gmail.com> # # Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved. This file is offered as-is, without any # warranty. #serial 4 AC_DEFUN([AX_SWITCH_FLAGS], [ AC_REQUIRE(AX_SAVE_FLAGS) AC_REQUIRE(AX_RESTORE_FLAGS) AS_IF([test "X$1" = "X"], AC_MSG_ERROR(newnamespace is empty)] AX_SAVE_FLAGS($1[]) AX_RESTORE_FLAGS($2[]) ])
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