# Copyright (C) The libssh2 project and its contributors.

# SPDX-License-Identifier: BSD-3-Clause

dnl CURL_CPP_P

dnl

dnl Check if $cpp -P should be used for extract define values due to gcc 5

dnl splitting up strings and defines between line outputs. gcc by default

dnl (without -P) will show TEST EINVAL TEST as

dnl

dnl # 13 "conftest.c"

dnl TEST

dnl # 13 "conftest.c" 3 4

dnl 22

dnl # 13 "conftest.c"

dnl TEST

AC_DEFUN([CURL_CPP_P], [

AC_MSG_CHECKING([if cpp -P is needed])

AC_EGREP_CPP([TEST.*TEST], [

#include <errno.h>

TEST EINVAL TEST

], [cpp=no], [cpp=yes])

AC_MSG_RESULT([$cpp])

dnl we need cpp -P so check if it works then

if test "x$cpp" = "xyes"; then

AC_MSG_CHECKING([if cpp -P works])

OLDCPPFLAGS=$CPPFLAGS

CPPFLAGS="$CPPFLAGS -P"

AC_EGREP_CPP([TEST.*TEST], [

#include <errno.h>

TEST EINVAL TEST

], [cpp_p=yes], [cpp_p=no])

AC_MSG_RESULT([$cpp_p])

if test "x$cpp_p" = "xno"; then

AC_MSG_WARN([failed to figure out cpp -P alternative])

# without -P

CPPPFLAG=""

else

# with -P

CPPPFLAG="-P"

fi

dnl restore CPPFLAGS

CPPFLAGS=$OLDCPPFLAGS

else

# without -P

CPPPFLAG=""

fi

])

dnl CURL_CHECK_DEF (SYMBOL, [INCLUDES], [SILENT])

dnl -------------------------------------------------

dnl Use the C preprocessor to find out if the given object-style symbol

dnl is defined and get its expansion. This macro will not use default

dnl includes even if no INCLUDES argument is given. This macro will run

dnl silently when invoked with three arguments. If the expansion would

dnl result in a set of double-quoted strings the returned expansion will

dnl actually be a single double-quoted string concatenating all them.

AC_DEFUN([CURL_CHECK_DEF], [

AC_REQUIRE([CURL_CPP_P])dnl

OLDCPPFLAGS=$CPPFLAGS

# CPPPFLAG comes from CURL_CPP_P

CPPFLAGS="$CPPFLAGS $CPPPFLAG"

AS_VAR_PUSHDEF([ac_HaveDef], [curl_cv_have_def_$1])dnl

AS_VAR_PUSHDEF([ac_Def], [curl_cv_def_$1])dnl

if test -z "$SED"; then

AC_MSG_ERROR([SED not set. Cannot continue without SED being set.])

fi

if test -z "$GREP"; then

AC_MSG_ERROR([GREP not set. Cannot continue without GREP being set.])

fi

ifelse($3,,[AC_MSG_CHECKING([for preprocessor definition of $1])])

tmp_exp=""

AC_PREPROC_IFELSE([

AC_LANG_SOURCE(

ifelse($2,,,[$2])[[

#ifdef $1

CURL_DEF_TOKEN $1

#endif

]])

],[

tmp_exp=`eval "$ac_cpp conftest.$ac_ext" 2>/dev/null | \

"$GREP" CURL_DEF_TOKEN 2>/dev/null | \

"$SED" 's/.*CURL_DEF_TOKEN[[ ]][[ ]]*//' 2>/dev/null | \

"$SED" 's/[["]][[ ]]*[["]]//g' 2>/dev/null`

if test -z "$tmp_exp" || test "$tmp_exp" = "$1"; then

tmp_exp=""

fi

])

if test -z "$tmp_exp"; then

AS_VAR_SET(ac_HaveDef, no)

ifelse($3,,[AC_MSG_RESULT([no])])

else

AS_VAR_SET(ac_HaveDef, yes)

AS_VAR_SET(ac_Def, $tmp_exp)

ifelse($3,,[AC_MSG_RESULT([$tmp_exp])])

fi

AS_VAR_POPDEF([ac_Def])dnl

AS_VAR_POPDEF([ac_HaveDef])dnl

CPPFLAGS=$OLDCPPFLAGS

])

dnl CURL_CHECK_COMPILER_CLANG

dnl -------------------------------------------------

dnl Verify if compiler being used is clang.

AC_DEFUN([CURL_CHECK_COMPILER_CLANG], [

AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU_C])dnl

AC_MSG_CHECKING([if compiler is clang])

CURL_CHECK_DEF([__clang__], [], [silent])

if test "$curl_cv_have_def___clang__" = "yes"; then

AC_MSG_RESULT([yes])

AC_MSG_CHECKING([if compiler is xlclang])

CURL_CHECK_DEF([__ibmxl__], [], [silent])

if test "$curl_cv_have_def___ibmxl__" = "yes" ; then

dnl IBM's almost-compatible clang version

AC_MSG_RESULT([yes])

compiler_id="XLCLANG"

else

AC_MSG_RESULT([no])

compiler_id="CLANG"

fi

flags_dbg_yes="-g"

flags_opt_all="-O -O0 -O1 -O2 -Os -O3 -O4"

flags_opt_yes="-O2"

flags_opt_off="-O0"

else

AC_MSG_RESULT([no])

fi

])

dnl **********************************************************************

dnl CURL_DETECT_ICC ([ACTION-IF-YES])

dnl

dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES

dnl sets the $ICC variable to "yes" or "no"

dnl **********************************************************************

AC_DEFUN([CURL_DETECT_ICC],

[

ICC="no"

AC_MSG_CHECKING([for icc in use])

if test "$GCC" = "yes"; then

dnl check if this is icc acting as gcc in disguise

AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER],

dnl action if the text is found, this it has not been replaced by the

dnl cpp

ICC="no",

dnl the text was not found, it was replaced by the cpp

ICC="yes"

AC_MSG_RESULT([yes])

[$1]

)

fi

if test "$ICC" = "no"; then

# this is not ICC

AC_MSG_RESULT([no])

fi

])

dnl We create a function for detecting which compiler we use and then set as

dnl pedantic compiler options as possible for that particular compiler. The

dnl options are only used for debug-builds.

AC_DEFUN([CURL_CC_DEBUG_OPTS],

[

if test "z$CLANG" = "z"; then

CURL_CHECK_COMPILER_CLANG

if test "z$compiler_id" = "zCLANG"; then

CLANG="yes"

else

CLANG="no"

fi

fi

if test "z$ICC" = "z"; then

CURL_DETECT_ICC

fi

if test "$CLANG" = "yes"; then

# indentation to match curl's m4/curl-compilers.m4

dnl figure out clang version!

AC_MSG_CHECKING([compiler version])

fullclangver=`$CC -v 2>&1 | grep version`

if echo $fullclangver | grep 'Apple' >/dev/null; then

appleclang=1

else

appleclang=0

fi

clangver=`echo $fullclangver | grep "based on LLVM " | "$SED" 's/.*(based on LLVM \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*)/\1/'`

if test -z "$clangver"; then

clangver=`echo $fullclangver | "$SED" 's/.*version \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/'`

oldapple=0

else

oldapple=1

fi

clangvhi=`echo $clangver | cut -d . -f1`

clangvlo=`echo $clangver | cut -d . -f2`

compiler_num=`(expr $clangvhi "*" 100 + $clangvlo) 2>/dev/null`

if test "$appleclang" = '1' && test "$oldapple" = '0'; then

dnl Starting with Xcode 7 / clang 3.7, Apple clang won't tell its upstream version

if test "$compiler_num" -ge '1300'; then compiler_num='1200'

elif test "$compiler_num" -ge '1205'; then compiler_num='1101'

elif test "$compiler_num" -ge '1204'; then compiler_num='1000'

elif test "$compiler_num" -ge '1107'; then compiler_num='900'

elif test "$compiler_num" -ge '1103'; then compiler_num='800'

elif test "$compiler_num" -ge '1003'; then compiler_num='700'

elif test "$compiler_num" -ge '1001'; then compiler_num='600'

elif test "$compiler_num" -ge '904'; then compiler_num='500'

elif test "$compiler_num" -ge '902'; then compiler_num='400'

elif test "$compiler_num" -ge '803'; then compiler_num='309'

elif test "$compiler_num" -ge '703'; then compiler_num='308'

else compiler_num='307'

fi

fi

AC_MSG_RESULT([clang '$compiler_num' (raw: '$fullclangver' / '$clangver')])

tmp_CFLAGS="-pedantic"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all extra])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shadow])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [inline nested-externs])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes])

tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-compare])

tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef])

tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align])

tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shorten-64-to-32])

#

dnl Only clang 1.1 or later

if test "$compiler_num" -ge "101"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused])

fi

#

dnl Only clang 2.7 or later

if test "$compiler_num" -ge "207"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [empty-body])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls])

# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [switch-enum]) # Not used because this basically disallows default case

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits])

if test "x$have_windows_h" != "xyes"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-macros]) # Seen to clash with libtool-generated stub code

fi

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code unused-parameter])

fi

#

dnl Only clang 2.8 or later

if test "$compiler_num" -ge "208"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [ignored-qualifiers])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla])

fi

#

dnl Only clang 2.9 or later

if test "$compiler_num" -ge "209"; then

tmp_CFLAGS="$tmp_CFLAGS -Wno-sign-conversion"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow])

# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used because we cannot change public structs

fi

#

dnl Only clang 3.0 or later

if test "$compiler_num" -ge "300"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [language-extension-token])

fi

#

dnl Only clang 3.2 or later

if test "$compiler_num" -ge "302"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sometimes-uninitialized])

case $host_os in

cygwin* | mingw*)

dnl skip missing-variable-declarations warnings for cygwin and

dnl mingw because the libtool wrapper executable causes them

;;

*)

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-variable-declarations])

;;

esac

fi

#

dnl Only clang 3.4 or later

if test "$compiler_num" -ge "304"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [header-guard])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-const-variable])

fi

#

dnl Only clang 3.5 or later

if test "$compiler_num" -ge "305"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pragmas])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code-break])

fi

#

dnl Only clang 3.6 or later

if test "$compiler_num" -ge "306"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion])

fi

#

dnl Only clang 3.9 or later

if test "$compiler_num" -ge "309"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [comma])

# avoid the varargs warning, fixed in 4.0

# https://bugs.llvm.org/show_bug.cgi?id=29140

if test "$compiler_num" -lt "400"; then

tmp_CFLAGS="$tmp_CFLAGS -Wno-varargs"

fi

fi

dnl clang 7 or later

if test "$compiler_num" -ge "700"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [assign-enum])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [extra-semi-stmt])

fi

CFLAGS="$CFLAGS $tmp_CFLAGS"

AC_MSG_NOTICE([Added this set of compiler options: $tmp_CFLAGS])

elif test "$GCC" = "yes"; then

# indentation to match curl's m4/curl-compilers.m4

dnl figure out gcc version!

AC_MSG_CHECKING([compiler version])

# strip '-suffix' parts, e.g. Ubuntu Windows cross-gcc returns '10-win32'

gccver=`$CC -dumpversion | sed -E 's/-.+$//'`

gccvhi=`echo $gccver | cut -d . -f1`

if echo $gccver | grep -F "." >/dev/null; then

gccvlo=`echo $gccver | cut -d . -f2`

else

gccvlo="0"

fi

compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null`

AC_MSG_RESULT([gcc '$compiler_num' (raw: '$gccver')])

if test "$ICC" = "yes"; then

dnl this is icc, not gcc.

dnl ICC warnings we ignore:

dnl * 269 warns on our "%Od" printf formatters for curl_off_t output:

dnl "invalid format string conversion"

dnl * 279 warns on static conditions in while expressions

dnl * 981 warns on "operands are evaluated in unspecified order"

dnl * 1418 "external definition with no prior declaration"

dnl * 1419 warns on "external declaration in primary source file"

dnl which we know and do on purpose.

tmp_CFLAGS="-wd279,269,981,1418,1419"

if test "$compiler_num" -gt "600"; then

dnl icc 6.0 and older doesn't have the -Wall flag

tmp_CFLAGS="-Wall $tmp_CFLAGS"

fi

else dnl $ICC = yes

dnl this is a set of options we believe *ALL* gcc versions support:

tmp_CFLAGS="-pedantic"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all])

tmp_CFLAGS="-W"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings])

#

dnl Only gcc 2.7 or later

if test "$compiler_num" -ge "207"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [inline nested-externs])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes])

fi

#

dnl Only gcc 2.95 or later

if test "$compiler_num" -ge "295"; then

tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast])

fi

#

dnl Only gcc 2.96 or later

if test "$compiler_num" -ge "296"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal])

tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-compare])

dnl -Wundef used only if gcc is 2.96 or later since we get

dnl lots of "`_POSIX_C_SOURCE' is not defined" in system

dnl headers with gcc 2.95.4 on FreeBSD 4.9

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef])

fi

#

dnl Only gcc 2.97 or later

if test "$compiler_num" -ge "297"; then

tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral"

fi

#

dnl Only gcc 3.0 or later

if test "$compiler_num" -ge "300"; then

tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers"

dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on

dnl on i686-Linux as it gives us heaps with false positives.

dnl Also, on gcc 4.0.X it is totally unbearable and complains all

dnl over making it unusable for generic purposes. Let's not use it.

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused shadow])

fi

#

dnl Only gcc 3.3 or later

if test "$compiler_num" -ge "303"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes])

fi

#

dnl Only gcc 3.4 or later

if test "$compiler_num" -ge "304"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition])

fi

#

dnl Only gcc 4.0 or later

if test "$compiler_num" -ge "400"; then

tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3"

fi

#

dnl Only gcc 4.1 or later (possibly earlier)

if test "$compiler_num" -ge "401"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code unused-parameter])

# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used because we cannot change public structs

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pragmas])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls])

# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [switch-enum]) # Not used because this basically disallows default case

# CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-macros]) # Not practical

fi

#

dnl Only gcc 4.2 or later

if test "$compiler_num" -ge "402"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align])

fi

#

dnl Only gcc 4.3 or later

if test "$compiler_num" -ge "403"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits old-style-declaration])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-parameter-type empty-body])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [clobbered ignored-qualifiers])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])

tmp_CFLAGS="$tmp_CFLAGS -Wno-sign-conversion"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla])

dnl required for -Warray-bounds, included in -Wall

tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp"

fi

#

dnl Only gcc 4.5 or later

if test "$compiler_num" -ge "405"; then

dnl Only windows targets

case $host_os in

mingw*)

tmp_CFLAGS="$tmp_CFLAGS -Wno-pedantic-ms-format"

;;

esac

fi

#

dnl Only gcc 4.6 or later

if test "$compiler_num" -ge "406"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion])

fi

#

dnl only gcc 4.8 or later

if test "$compiler_num" -ge "408"; then

tmp_CFLAGS="$tmp_CFLAGS -Wformat=2"

fi

#

dnl Only gcc 5 or later

if test "$compiler_num" -ge "500"; then

tmp_CFLAGS="$tmp_CFLAGS -Warray-bounds=2"

fi

#

dnl Only gcc 6 or later

if test "$compiler_num" -ge "600"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-negative-value])

tmp_CFLAGS="$tmp_CFLAGS -Wshift-overflow=2"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [null-dereference])

tmp_CFLAGS="$tmp_CFLAGS -fdelete-null-pointer-checks"

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [duplicated-cond])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-const-variable])

fi

#

dnl Only gcc 7 or later

if test "$compiler_num" -ge "700"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [duplicated-branches])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [restrict])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [alloc-zero])

tmp_CFLAGS="$tmp_CFLAGS -Wformat-overflow=2"

tmp_CFLAGS="$tmp_CFLAGS -Wformat-truncation=1" # =2 causes false positives

fi

#

dnl Only gcc 10 or later

if test "$compiler_num" -ge "1000"; then

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [arith-conversion])

CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion])

fi

for flag in $CPPFLAGS; do

case "$flag" in

-I*)

dnl Include path, provide a -isystem option for the same dir

dnl to prevent warnings in those dirs. The -isystem was not very

dnl reliable on earlier gcc versions.

add=`echo $flag | sed 's/^-I/-isystem /g'`

tmp_CFLAGS="$tmp_CFLAGS $add"

;;

esac

done

fi dnl $ICC = no

CFLAGS="$CFLAGS $tmp_CFLAGS"

AC_MSG_NOTICE([Added this set of compiler options: $tmp_CFLAGS])

else dnl $GCC = yes

AC_MSG_NOTICE([Added no extra compiler options])

fi dnl $GCC = yes

dnl strip off optimizer flags

NEWFLAGS=""

for flag in $CFLAGS; do

case "$flag" in

-O*)

dnl echo "cut off $flag"

;;

*)

NEWFLAGS="$NEWFLAGS $flag"

;;

esac

done

CFLAGS=$NEWFLAGS

]) dnl end of AC_DEFUN()

dnl CURL_ADD_COMPILER_WARNINGS (WARNING-LIST, NEW-WARNINGS)

dnl -------------------------------------------------------

dnl Contents of variable WARNING-LIST and NEW-WARNINGS are

dnl handled as whitespace separated lists of words.

dnl Add each compiler warning from NEW-WARNINGS that has not

dnl been disabled via CFLAGS to WARNING-LIST.

AC_DEFUN([CURL_ADD_COMPILER_WARNINGS], [

AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl

ac_var_added_warnings=""

for warning in [$2]; do

CURL_VAR_MATCH(CFLAGS, [-Wno-$warning -W$warning])

if test "$ac_var_match_word" = "no"; then

ac_var_added_warnings="$ac_var_added_warnings -W$warning"

fi

done

dnl squeeze whitespace out of result

[$1]="$[$1] $ac_var_added_warnings"

squeeze [$1]

])

dnl CURL_SHFUNC_SQUEEZE

dnl -------------------------------------------------

dnl Declares a shell function squeeze() which removes

dnl redundant whitespace out of a shell variable.

AC_DEFUN([CURL_SHFUNC_SQUEEZE], [

squeeze() {

_sqz_result=""

eval _sqz_input=\[$][$]1

for _sqz_token in $_sqz_input; do

if test -z "$_sqz_result"; then

_sqz_result="$_sqz_token"

else

_sqz_result="$_sqz_result $_sqz_token"

fi

done

eval [$]1=\$_sqz_result

return 0

}

])

dnl CURL_VAR_MATCH (VARNAME, VALUE)

dnl -------------------------------------------------

dnl Verifies if shell variable VARNAME contains VALUE.

dnl Contents of variable VARNAME and VALUE are handled

dnl as whitespace separated lists of words. If at least

dnl one word of VALUE is present in VARNAME the match

dnl is considered positive, otherwise false.

AC_DEFUN([CURL_VAR_MATCH], [

ac_var_match_word="no"

for word1 in $[$1]; do

for word2 in [$2]; do

if test "$word1" = "$word2"; then

ac_var_match_word="yes"

fi

done

done

])

dnl CURL_CHECK_NONBLOCKING_SOCKET

dnl -------------------------------------------------

dnl Check for how to set a socket to non-blocking state. There seems to exist

dnl four known different ways, with the one used almost everywhere being POSIX

dnl and XPG3, while the other different ways for different systems (old BSD,

dnl Windows and Amiga).

dnl

dnl There are two known platforms (AIX 3.x and SunOS 4.1.x) where the

dnl O_NONBLOCK define is found but does not work. This condition is attempted

dnl to get caught in this script by using an excessive number of #ifdefs...

dnl

AC_DEFUN([CURL_CHECK_NONBLOCKING_SOCKET],

[

AC_MSG_CHECKING([non-blocking sockets style])

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

/* headers for O_NONBLOCK test */

#include <sys/types.h>

#include <unistd.h>

#include <fcntl.h>

]], [[

/* try to compile O_NONBLOCK */

#if defined(sun) || defined(__sun__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)

# if defined(__SVR4) || defined(__srv4__)

# define PLATFORM_SOLARIS

# else

# define PLATFORM_SUNOS4

# endif

#endif

#if (defined(_AIX) || defined(__xlC__)) && !defined(_AIX41)

# define PLATFORM_AIX_V3

#endif

#if defined(PLATFORM_SUNOS4) || defined(PLATFORM_AIX_V3) || defined(__BEOS__)

#error "O_NONBLOCK does not work on this platform"

#endif

int socket;

int flags = fcntl(socket, F_SETFL, flags | O_NONBLOCK);

]])],[

dnl the O_NONBLOCK test was fine

nonblock="O_NONBLOCK"

AC_DEFINE(HAVE_O_NONBLOCK, 1, [use O_NONBLOCK for non-blocking sockets])

],[

dnl the code was bad, try a different program now, test 2

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

/* headers for FIONBIO test */

#include <unistd.h>

#include <stropts.h>

]], [[

/* FIONBIO source test (old-style unix) */

int socket;

int flags = ioctl(socket, FIONBIO, &flags);

]])],[

dnl FIONBIO test was good

nonblock="FIONBIO"

AC_DEFINE(HAVE_FIONBIO, 1, [use FIONBIO for non-blocking sockets])

],[

dnl FIONBIO test was also bad

dnl the code was bad, try a different program now, test 3

AC_LINK_IFELSE([AC_LANG_PROGRAM([[

/* headers for IoctlSocket test (Amiga?) */

#include <sys/ioctl.h>

]], [[

/* IoctlSocket source code */

int socket;

int flags = IoctlSocket(socket, FIONBIO, (long)1);

]])],[

dnl ioctlsocket test was good

nonblock="IoctlSocket"

AC_DEFINE(HAVE_IOCTLSOCKET_CASE, 1, [use Ioctlsocket() for non-blocking sockets])

],[

dnl Ioctlsocket did not compile, do test 4!

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

/* headers for SO_NONBLOCK test (BeOS) */

#include <socket.h>

]], [[

/* SO_NONBLOCK source code */

long b = 1;

int socket;

int flags = setsockopt(socket, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));

]])],[

dnl the SO_NONBLOCK test was good

nonblock="SO_NONBLOCK"

AC_DEFINE(HAVE_SO_NONBLOCK, 1, [use SO_NONBLOCK for non-blocking sockets])

],[

dnl test 4 did not compile!

nonblock="nada"

])

dnl end of forth test

])

dnl end of third test

])

dnl end of second test

])

dnl end of non-blocking try-compile test

AC_MSG_RESULT($nonblock)

if test "$nonblock" = "nada"; then

AC_MSG_WARN([non-block sockets disabled])

fi

])

dnl CURL_CHECK_NEED_REENTRANT_SYSTEM

dnl -------------------------------------------------

dnl Checks if the preprocessor _REENTRANT definition

dnl must be unconditionally done for this platform.

dnl Internal macro for CURL_CONFIGURE_REENTRANT.

AC_DEFUN([CURL_CHECK_NEED_REENTRANT_SYSTEM], [

case $host in

*-*-solaris* | *-*-hpux*)

tmp_need_reentrant="yes"

;;

*)

tmp_need_reentrant="no"

;;

esac

])

dnl CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT

dnl -------------------------------------------------

dnl This macro ensures that configuration tests done

dnl after this will execute with preprocessor symbol

dnl _REENTRANT defined. This macro also ensures that

dnl the generated config file defines NEED_REENTRANT

dnl and that in turn setup.h will define _REENTRANT.

dnl Internal macro for CURL_CONFIGURE_REENTRANT.

AC_DEFUN([CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT], [

AC_DEFINE(NEED_REENTRANT, 1,

[Define to 1 if _REENTRANT preprocessor symbol must be defined.])

cat >>confdefs.h <<_EOF

#ifndef _REENTRANT

# define _REENTRANT

#endif

_EOF

])

dnl CURL_CONFIGURE_REENTRANT

dnl -------------------------------------------------

dnl This first checks if the preprocessor _REENTRANT

dnl symbol is already defined. If it isn't currently

dnl defined a set of checks are performed to verify

dnl if its definition is required to make visible to

dnl the compiler a set of *_r functions. Finally, if

dnl _REENTRANT is already defined or needed it takes

dnl care of making adjustments necessary to ensure

dnl that it is defined equally for further configure

dnl tests and generated config file.

AC_DEFUN([CURL_CONFIGURE_REENTRANT], [

AC_PREREQ([2.50])dnl

#

AC_MSG_CHECKING([if _REENTRANT is already defined])

AC_COMPILE_IFELSE([

AC_LANG_PROGRAM([[

]],[[

#ifdef _REENTRANT

int dummy=1;

#else

force compilation error

#endif

]])

],[

AC_MSG_RESULT([yes])

tmp_reentrant_initially_defined="yes"

],[

AC_MSG_RESULT([no])

tmp_reentrant_initially_defined="no"

])

#

if test "$tmp_reentrant_initially_defined" = "no"; then

AC_MSG_CHECKING([if _REENTRANT is actually needed])

CURL_CHECK_NEED_REENTRANT_SYSTEM

if test "$tmp_need_reentrant" = "yes"; then

AC_MSG_RESULT([yes])

else

AC_MSG_RESULT([no])

fi

fi

#

AC_MSG_CHECKING([if _REENTRANT is onwards defined])

if test "$tmp_reentrant_initially_defined" = "yes" ||

test "$tmp_need_reentrant" = "yes"; then

CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT

AC_MSG_RESULT([yes])

else

AC_MSG_RESULT([no])

fi

#

])

dnl LIBSSH2_LIB_HAVE_LINKFLAGS

dnl --------------------------

dnl Wrapper around AC_LIB_HAVE_LINKFLAGS to also check $prefix/lib, if set.

dnl

dnl autoconf only checks $prefix/lib64 if gcc -print-search-dirs output

dnl includes a directory named lib64. So, to find libraries in $prefix/lib

dnl we append -L$prefix/lib to LDFLAGS before checking.

dnl

dnl For conveniece, $4 is expanded if [lib]$1 is found.

AC_DEFUN([LIBSSH2_LIB_HAVE_LINKFLAGS], [

libssh2_save_CPPFLAGS="$CPPFLAGS"

libssh2_save_LDFLAGS="$LDFLAGS"

if test "${with_lib$1_prefix+set}" = set; then

CPPFLAGS="$CPPFLAGS${CPPFLAGS:+ }-I${with_lib$1_prefix}/include"

LDFLAGS="$LDFLAGS${LDFLAGS:+ }-L${with_lib$1_prefix}/lib"

fi

AC_LIB_HAVE_LINKFLAGS([$1], [$2], [$3])

LDFLAGS="$libssh2_save_LDFLAGS"

if test "$ac_cv_lib$1" = "yes"; then :

$4

else

CPPFLAGS="$libssh2_save_CPPFLAGS"

fi

])

AC_DEFUN([LIBSSH2_CHECK_CRYPTO], [

if test "$use_crypto" = "auto" && test "$found_crypto" = "none" || test "$use_crypto" = "$1"; then

m4_case([$1],

[openssl], [

LIBSSH2_LIB_HAVE_LINKFLAGS([ssl], [crypto], [#include <openssl/ssl.h>], [

AC_DEFINE(LIBSSH2_OPENSSL, 1, [Use $1])

LIBSSH2_PC_REQUIRES_PRIVATE="$LIBSSH2_PC_REQUIRES_PRIVATE${LIBSSH2_PC_REQUIRES_PRIVATE:+,}libcrypto"

found_crypto="$1"

found_crypto_str="OpenSSL"

])

],

[wolfssl], [

if test "${with_libwolfssl_prefix+set}" = set; then

CPPFLAGS="$CPPFLAGS${CPPFLAGS:+ }-I${with_libwolfssl_prefix}/include/wolfssl"

else

AC_MSG_ERROR([When using wolfSSL, must specify prefix with --with-libwolfssl-prefix in order to find OpenSSL compatibility headers.])

fi

LIBSSH2_LIB_HAVE_LINKFLAGS([wolfssl], [], [#include <wolfssl/options.h>], [

AC_DEFINE(LIBSSH2_WOLFSSL, 1, [Use $1])

LIBSSH2_PC_REQUIRES_PRIVATE="$LIBSSH2_PC_REQUIRES_PRIVATE${LIBSSH2_PC_REQUIRES_PRIVATE:+,}wolfssl"

found_crypto="$1"

])

],

[libgcrypt], [

LIBSSH2_LIB_HAVE_LINKFLAGS([gcrypt], [], [#include <gcrypt.h>], [

AC_DEFINE(LIBSSH2_LIBGCRYPT, 1, [Use $1])

LIBSSH2_PC_REQUIRES_PRIVATE="$LIBSSH2_PC_REQUIRES_PRIVATE${LIBSSH2_PC_REQUIRES_PRIVATE:+,}libgcrypt"

found_crypto="$1"

])

],

[mbedtls], [

LIBSSH2_LIB_HAVE_LINKFLAGS([mbedcrypto], [], [#include <mbedtls/version.h>], [

AC_DEFINE(LIBSSH2_MBEDTLS, 1, [Use $1])

LIBS="$LIBS -lmbedcrypto"

found_crypto="$1"

])

],

[wincng], [

if test "x$have_windows_h" = "xyes"; then

# Look for Windows Cryptography API: Next Generation

LIBS="$LIBS -lcrypt32"

# Check necessary for old-MinGW

LIBSSH2_LIB_HAVE_LINKFLAGS([bcrypt], [], [

#include <windows.h>

#include <bcrypt.h>

], [

AC_DEFINE(LIBSSH2_WINCNG, 1, [Use $1])

found_crypto="$1"

found_crypto_str="Windows Cryptography API: Next Generation"

])

fi

],

)

test "$found_crypto" = "none" &&

crypto_errors="${crypto_errors}No $1 crypto library found!

"

fi

])

dnl LIBSSH2_CHECK_OPTION_WERROR

dnl -------------------------------------------------

dnl Verify if configure has been invoked with option

dnl --enable-werror or --disable-werror, and set

dnl shell variable want_werror as appropriate.

AC_DEFUN([LIBSSH2_CHECK_OPTION_WERROR], [

AC_BEFORE([$0],[LIBSSH2_CHECK_COMPILER])dnl

AC_MSG_CHECKING([whether to enable compiler warnings as errors])

OPT_COMPILER_WERROR="default"

AC_ARG_ENABLE(werror,

AS_HELP_STRING([--enable-werror],[Enable compiler warnings as errors])

AS_HELP_STRING([--disable-werror],[Disable compiler warnings as errors]),

OPT_COMPILER_WERROR=$enableval)

case "$OPT_COMPILER_WERROR" in

no)

dnl --disable-werror option used

want_werror="no"

;;

default)

dnl configure option not specified

want_werror="no"

;;

*)

dnl --enable-werror option used

want_werror="yes"

;;

esac

AC_MSG_RESULT([$want_werror])

if test X"$want_werror" = Xyes; then

CFLAGS="$CFLAGS -Werror"

fi

])