MHD_FIND_ADD_CC_{C,LD}FLAG_IFELSE: added new autoconf macros

1 files changed, 45 insertions, 0 deletions

diff --git a/m4/mhd_find_add_cc_cflag_ifelse.m4 b/m4/mhd_find_add_cc_cflag_ifelse.m4
new file mode 100644
index 00000000..337c4561
--- /dev/null
+++ b/m4/mhd_find_add_cc_cflag_ifelse.m4
@@ -0,0 +1,45 @@
+# SYNOPSIS
+#
+#   MHD_FIND_ADD_CC_CFLAG_IFELSE([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
+#                                [VARIABLE-TO-EXTEND],
+#                                [FLAG1-TO-TEST], [FLAG2-TO-TEST], ...)
+#
+# DESCRIPTION
+#
+#   This macro checks whether the specific compiler flags are supported.
+#   The flags are checked one-by-one. The checking is stopped when the first
+#   supported flag found.
+#   The checks are performing by appending FLAGx-TO-TEST to the value of
+#   VARIABLE-TO-EXTEND (CFLAGS if not specified), then prepending result to
+#   CFLAGS (unless VARIABLE-TO-EXTEND is CFLAGS), and then performing compile
+#   and link test. If test succeed without warnings, then the flag is added to
+#   VARIABLE-TO-EXTEND and next flags are not checked. If compile-link cycle
+#   cannot be performed without warning with all tested flags, no flag is
+#   added to the VARIABLE-TO-EXTEND.
+#   If any suitable flag is found, ACTION-IF-FOUND is executed otherwise
+#   ACTION-IF-NOT-FOUND is executed. Found flag (if any) is available as
+#   value of shell variable $mhd_cc_found_flag during action execution.
+#
+#   Example usage:
+#
+#     MHD_FIND_ADD_CC_CFLAG_IFELSE([AC_MSG_NOTICE([Enabled debug information])],
+#                                  [],
+#                                  [additional_CFLAGS],
+#                                  [-ggdb3], [-g3], [-ggdb], [-g])
+#
+#   Note: Unlike others MHD_CHECK_*CC_CFLAG* macro, this macro uses another
+#   order of parameters.
+#
+# LICENSE
+#
+#   Copyright (c) 2022 Karlson2k (Evgeny Grin) <k2k@narod.ru>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 1
+
+AC_DEFUN([MHD_FIND_ADD_CC_CFLAG_IFELSE],[dnl
+_MHD_FIND_ADD_CC_XFLAG([[CFLAGS]],$@)])