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-rw-r--r--m4/cc-flags.m4112
-rw-r--r--m4/clang.m44
-rw-r--r--m4/gssapi.m46
-rw-r--r--m4/krb5-config.m413
-rw-r--r--m4/krb5.m46
-rw-r--r--m4/lib-depends.m46
-rw-r--r--m4/lib-pathname.m46
-rw-r--r--m4/remctl.m46
-rw-r--r--m4/snprintf.m46
-rw-r--r--m4/vamacros.m46
10 files changed, 151 insertions, 20 deletions
diff --git a/m4/cc-flags.m4 b/m4/cc-flags.m4
new file mode 100644
index 0000000..8a5aa8a
--- /dev/null
+++ b/m4/cc-flags.m4
@@ -0,0 +1,112 @@
+dnl Check whether the compiler supports particular flags.
+dnl
+dnl Provides RRA_PROG_CC_FLAG, which checks whether a compiler supports a
+dnl given flag. If it does, the commands in the second argument are run. If
+dnl not, the commands in the third argument are run.
+dnl
+dnl Provides RRA_PROG_CC_WARNINGS_FLAGS, which checks whether a compiler
+dnl supports a large set of warning flags and sets the WARNINGS_CFLAGS
+dnl substitution variable to all of the supported warning flags. (Note that
+dnl this may be too aggressive for some people.)
+dnl
+dnl Depends on RRA_PROG_CC_CLANG.
+dnl
+dnl The canonical version of this file is maintained in the rra-c-util
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl
+dnl Copyright 2016-2018 Russ Allbery <eagle@eyrie.org>
+dnl Copyright 2006, 2009, 2016
+dnl by Internet Systems Consortium, Inc. ("ISC")
+dnl
+dnl Permission to use, copy, modify, and/or distribute this software for any
+dnl purpose with or without fee is hereby granted, provided that the above
+dnl copyright notice and this permission notice appear in all copies.
+dnl
+dnl THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+dnl REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+dnl MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
+dnl SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+dnl WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+dnl ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+dnl IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+dnl
+dnl SPDX-License-Identifier: ISC
+
+dnl Used to build the result cache name.
+AC_DEFUN([_RRA_PROG_CC_FLAG_CACHE],
+[translit([rra_cv_compiler_c_$1], [-=+], [___])])
+
+dnl Check whether a given flag is supported by the complier.
+AC_DEFUN([RRA_PROG_CC_FLAG],
+[AC_REQUIRE([AC_PROG_CC])
+ AC_MSG_CHECKING([if $CC supports $1])
+ AC_CACHE_VAL([_RRA_PROG_CC_FLAG_CACHE([$1])],
+ [save_CFLAGS=$CFLAGS
+ AS_CASE([$1],
+ [-Wno-*], [CFLAGS="$CFLAGS `echo "$1" | sed 's/-Wno-/-W/'`"],
+ [*], [CFLAGS="$CFLAGS $1"])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [int foo = 0;])],
+ [_RRA_PROG_CC_FLAG_CACHE([$1])=yes],
+ [_RRA_PROG_CC_FLAG_CACHE([$1])=no])
+ CFLAGS=$save_CFLAGS])
+ AC_MSG_RESULT([$_RRA_PROG_CC_FLAG_CACHE([$1])])
+ AS_IF([test x"$_RRA_PROG_CC_FLAG_CACHE([$1])" = xyes], [$2], [$3])])
+
+dnl Determine the full set of viable warning flags for the current compiler.
+dnl
+dnl This is based partly on personal preference and is a fairly aggressive set
+dnl of warnings. Desirable CC warnings that can't be turned on due to other
+dnl problems:
+dnl
+dnl -Wsign-conversion Too many fiddly changes for the benefit
+dnl -Wstack-protector Too many false positives from small buffers
+dnl
+dnl Last checked against gcc 7.2.0 (2017-12-28). -D_FORTIFY_SOURCE=2 enables
+dnl warn_unused_result attribute markings on glibc functions on Linux, which
+dnl catches a few more issues. Add -O2 because gcc won't find some warnings
+dnl without optimization turned on.
+dnl
+dnl For Clang, we try to use -Weverything, but we have to disable some of the
+dnl warnings:
+dnl
+dnl -Wcast-qual Some structs require casting away const
+dnl -Wdisabled-macro-expansion Triggers on libc (sigaction.sa_handler)
+dnl -Wpadded Not an actual problem
+dnl -Wreserved-id-macros Autoconf sets several of these normally
+dnl -Wsign-conversion Too many fiddly changes for the benefit
+dnl -Wtautological-pointer-compare False positives with for loops
+dnl -Wundef Conflicts with Autoconf probe results
+dnl -Wunreachable-code Happens with optional compilation
+dnl -Wunreachable-code-return Other compilers get confused
+dnl -Wunused-macros Often used on suppressed branches
+dnl -Wused-but-marked-unused Happens a lot with conditional code
+dnl
+dnl Sets WARNINGS_CFLAGS as a substitution variable.
+AC_DEFUN([RRA_PROG_CC_WARNINGS_FLAGS],
+[AC_REQUIRE([RRA_PROG_CC_CLANG])
+ AS_IF([test x"$CLANG" = xyes],
+ [WARNINGS_CFLAGS="-Werror"
+ m4_foreach_w([flag],
+ [-Weverything -Wno-cast-qual -Wno-disabled-macro-expansion -Wno-padded
+ -Wno-sign-conversion -Wno-reserved-id-macro
+ -Wno-tautological-pointer-compare -Wno-undef -Wno-unreachable-code
+ -Wno-unreachable-code-return -Wno-unused-macros
+ -Wno-used-but-marked-unused],
+ [RRA_PROG_CC_FLAG(flag,
+ [WARNINGS_CFLAGS="${WARNINGS_CFLAGS} flag"])])],
+ [WARNINGS_CFLAGS="-g -O2 -D_FORTIFY_SOURCE=2 -Werror"
+ m4_foreach_w([flag],
+ [-fstrict-overflow -fstrict-aliasing -Wall -Wextra -Wformat=2
+ -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation=2
+ -Wnull-dereference -Winit-self -Wswitch-enum -Wstrict-overflow=5
+ -Wmissing-format-attribute -Walloc-zero -Wduplicated-branches
+ -Wduplicated-cond -Wtrampolines -Wfloat-equal
+ -Wdeclaration-after-statement -Wshadow -Wpointer-arith
+ -Wbad-function-cast -Wcast-align -Wwrite-strings -Wconversion
+ -Wno-sign-conversion -Wdate-time -Wjump-misses-init -Wlogical-op
+ -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes
+ -Wmissing-declarations -Wnormalized=nfc -Wpacked -Wredundant-decls
+ -Wrestrict -Wnested-externs -Winline -Wvla],
+ [RRA_PROG_CC_FLAG(flag,
+ [WARNINGS_CFLAGS="${WARNINGS_CFLAGS} flag"])])])
+ AC_SUBST([WARNINGS_CFLAGS])])
diff --git a/m4/clang.m4 b/m4/clang.m4
index 0659d82..c1815a5 100644
--- a/m4/clang.m4
+++ b/m4/clang.m4
@@ -3,13 +3,15 @@ dnl
dnl If the current compiler is Clang, set the shell variable CLANG to yes.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Copyright 2015 Russ Allbery <eagle@eyrie.org>
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Source used by RRA_PROG_CC_CLANG.
AC_DEFUN([_RRA_PROG_CC_CLANG_SOURCE], [[
diff --git a/m4/gssapi.m4 b/m4/gssapi.m4
index f2ad5bb..5828b1b 100644
--- a/m4/gssapi.m4
+++ b/m4/gssapi.m4
@@ -19,15 +19,17 @@ dnl Depends on RRA_KRB5_CONFIG, RRA_ENABLE_REDUCED_DEPENDS, and
dnl RRA_SET_LDFLAGS.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2005, 2006, 2007, 2008, 2009, 2011, 2012
+dnl Copyright 2005-2009, 2011-2012
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Headers to include when probing for Kerberos library properties.
AC_DEFUN([RRA_INCLUDES_GSSAPI], [[
diff --git a/m4/krb5-config.m4 b/m4/krb5-config.m4
index c69c4f3..bbfcdc1 100644
--- a/m4/krb5-config.m4
+++ b/m4/krb5-config.m4
@@ -8,15 +8,18 @@ dnl
dnl Depends on RRA_ENABLE_REDUCED_DEPENDS.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2011, 2012
+dnl Copyright 2018 Russ Allbery <eagle@eyrie.org>
+dnl Copyright 2011-2012
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Check for krb5-config in the user's path and set PATH_KRB5_CONFIG. This
dnl is moved into a separate macro so that it can be loaded via AC_REQUIRE,
@@ -75,12 +78,12 @@ dnl argument if that option was requested and not supported. Old versions of
dnl krb5-config didn't take an argument to specify the library type, but
dnl always returned the flags for libkrb5.
AC_DEFUN([RRA_KRB5_CONFIG],
-[AC_REQUIRE([_RRA_KRB5_CONFIG_PATH])
- rra_krb5_config_$3=
+[rra_krb5_config_$3=
rra_krb5_config_$3[]_ok=
AS_IF([test x"$1" != x && test -x "$1/bin/krb5-config"],
[rra_krb5_config_$3="$1/bin/krb5-config"],
- [rra_krb5_config_$3="$PATH_KRB5_CONFIG"])
+ [_RRA_KRB5_CONFIG_PATH
+ rra_krb5_config_$3="$PATH_KRB5_CONFIG"])
AS_IF([test x"$rra_krb5_config_$3" != x && test -x "$rra_krb5_config_$3"],
[AC_CACHE_CHECK([for $2 support in krb5-config], [rra_cv_lib_$3[]_config],
[AS_IF(["$rra_krb5_config_$3" 2>&1 | grep $2 >/dev/null 2>&1],
diff --git a/m4/krb5.m4 b/m4/krb5.m4
index 683e30b..8d9db43 100644
--- a/m4/krb5.m4
+++ b/m4/krb5.m4
@@ -47,15 +47,17 @@ dnl Also provides RRA_INCLUDES_KRB5, which are the headers to include when
dnl probing the Kerberos library properties.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013, 2014
+dnl Copyright 2005-2011, 2013-2014
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Ignore Automake conditionals if not using Automake.
m4_define_default([AM_CONDITIONAL], [:])
diff --git a/m4/lib-depends.m4 b/m4/lib-depends.m4
index 22d38ee..09a2cf9 100644
--- a/m4/lib-depends.m4
+++ b/m4/lib-depends.m4
@@ -10,15 +10,17 @@ dnl This macro doesn't do much but is defined separately so that other macros
dnl can require it with AC_REQUIRE.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2005, 2006, 2007
+dnl Copyright 2005-2007
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
AC_DEFUN([RRA_ENABLE_REDUCED_DEPENDS],
[rra_reduced_depends=false
diff --git a/m4/lib-pathname.m4 b/m4/lib-pathname.m4
index 828270f..46e8879 100644
--- a/m4/lib-pathname.m4
+++ b/m4/lib-pathname.m4
@@ -13,15 +13,17 @@ dnl This file also provides the Autoconf macro RRA_SET_LIBDIR, which sets the
dnl libdir variable to PREFIX/lib{,32,64} as appropriate.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2008, 2009
+dnl Copyright 2008-2009
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Probe for the alternate library name that we should attempt on this
dnl architecture, given the size of an int, and set rra_lib_arch_name to that
diff --git a/m4/remctl.m4 b/m4/remctl.m4
index c2fbf9a..292313f 100644
--- a/m4/remctl.m4
+++ b/m4/remctl.m4
@@ -23,15 +23,17 @@ dnl Depends on RRA_ENABLE_REDUCED_DEPENDS, RRA_SET_LDFLAGS, and
dnl RRA_LIB_GSSAPI.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2008, 2009, 2011, 2013
+dnl Copyright 2008-2009, 2011, 2013
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
dnl versions that include the remctl flags. Used as a wrapper, with
diff --git a/m4/snprintf.m4 b/m4/snprintf.m4
index f134ab9..e739bbf 100644
--- a/m4/snprintf.m4
+++ b/m4/snprintf.m4
@@ -10,15 +10,17 @@ dnl Provides RRA_FUNC_SNPRINTF, which adds snprintf.o to LIBOBJS unless a
dnl fully working snprintf is found.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2006, 2008, 2009
+dnl Copyright 2006, 2008-2009
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
dnl Source used by RRA_FUNC_SNPRINTF.
AC_DEFUN([_RRA_FUNC_SNPRINTF_SOURCE], [[
diff --git a/m4/vamacros.m4 b/m4/vamacros.m4
index 62fb82d..5595b86 100644
--- a/m4/vamacros.m4
+++ b/m4/vamacros.m4
@@ -14,15 +14,17 @@ dnl
dnl They set HAVE_C99_VAMACROS or HAVE_GNU_VAMACROS as appropriate.
dnl
dnl The canonical version of this file is maintained in the rra-c-util
-dnl package, available at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
dnl
dnl Written by Russ Allbery <eagle@eyrie.org>
-dnl Copyright 2006, 2008, 2009
+dnl Copyright 2006, 2008-2009
dnl The Board of Trustees of the Leland Stanford Junior University
dnl
dnl This file is free software; the authors give unlimited permission to copy
dnl and/or distribute it, with or without modifications, as long as this
dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
AC_DEFUN([_RRA_C_C99_VAMACROS_SOURCE], [[
#include <stdio.h>
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-05 16:44:51 +0000