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Enforce C++14 requirement

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Chocobo1 committed Dec 24, 2018
1 parent 6bd5d0b commit 814488863d9dfdf96f28548b39a29bf168eafb2a
Showing with 46 additions and 46 deletions.
  1. +24 −24 configure
  2. +17 −17 configure.ac
  3. +5 −5 m4/qbittorrent.m4
@@ -5590,16 +5590,16 @@ $as_echo "yes" >&6; }
LIBS="$zlib_LIBS $LIBS"
fi

# Check if already in >= C++11 mode because of the flags returned by one of the above packages
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler is using C++11 or later mode" >&5
$as_echo_n "checking if compiler is using C++11 or later mode... " >&6; }
# Check if already in >= C++14 mode because of the flags returned by one of the above packages
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler is using C++14 or later mode" >&5
$as_echo_n "checking if compiler is using C++14 or later mode... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201103L
#error "This is not a C++11 compiler"
#elif __cplusplus < 201402L
#error "This is not a C++14 compiler"
#endif
int
main ()
@@ -5613,28 +5613,28 @@ _ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
QBT_CXX11_FOUND="yes"
QBT_CXX14_FOUND="yes"
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
QBT_CXX11_FOUND="no"
QBT_CXX14_FOUND="no"
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext

# In case of no, check if the compiler can support at least C++11
# In case of no, check if the compiler can support at least C++14
# and if yes, enable it leaving a warning to the user
if test "x$QBT_CXX11_FOUND" = "xno"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler supports C++11" >&5
$as_echo_n "checking if compiler supports C++11... " >&6; }
if test "x$QBT_CXX14_FOUND" = "xno"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler supports C++14" >&5
$as_echo_n "checking if compiler supports C++14... " >&6; }
TMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=c++11"
CXXFLAGS="$CXXFLAGS -std=c++14"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201103L
#error "This is not a C++11 compiler"
#elif __cplusplus < 201402L
#error "This is not a C++14 compiler"
#endif
int
main ()
@@ -5648,17 +5648,17 @@ _ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if C++11 is disabled by the set compiler flags" >&5
$as_echo_n "checking if C++11 is disabled by the set compiler flags... " >&6; }
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if C++14 is disabled by the set compiler flags" >&5
$as_echo_n "checking if C++14 is disabled by the set compiler flags... " >&6; }
# prepend the flag so it won't override conflicting user defined flags
CXXFLAGS="-std=c++11 $TMP_CXXFLAGS"
CXXFLAGS="-std=c++14 $TMP_CXXFLAGS"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201103L
#error "This is not a C++11 compiler"
#elif __cplusplus < 201402L
#error "This is not a C++14 compiler"
#endif
int
main ()
@@ -5672,25 +5672,25 @@ _ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
CXXFLAGS="$TMP_CXXFLAGS -std=c++11"
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: C++11 mode is now force enabled.
CXXFLAGS="$TMP_CXXFLAGS -std=c++14"
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: C++14 mode is now force enabled.
Make sure you use the same C++ mode for qBittorrent and its dependencies.
To explicitly set qBittorrent to a later mode use CXXFLAGS.
Example: \`CXXFLAGS=\"\$CXXFLAGS -std=c++14\" ./configure\`" >&5
$as_echo "$as_me: WARNING: C++11 mode is now force enabled.
$as_echo "$as_me: WARNING: C++14 mode is now force enabled.
Make sure you use the same C++ mode for qBittorrent and its dependencies.
To explicitly set qBittorrent to a later mode use CXXFLAGS.
Example: \`CXXFLAGS=\"\$CXXFLAGS -std=c++14\" ./configure\`" >&2;}
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
as_fn_error $? "The compiler supports C++11 but the user or a dependency has explicitly enabled a lower mode." "$LINENO" 5
as_fn_error $? "The compiler supports C++14 but the user or a dependency has explicitly enabled a lower mode." "$LINENO" 5
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
as_fn_error $? "A compiler supporting C++11 is required." "$LINENO" 5
as_fn_error $? "A compiler supporting C++14 is required." "$LINENO" 5
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext

@@ -209,36 +209,36 @@ PKG_CHECK_MODULES(zlib,
[CXXFLAGS="$zlib_CFLAGS $CXXFLAGS"
LIBS="$zlib_LIBS $LIBS"])

# Check if already in >= C++11 mode because of the flags returned by one of the above packages
AC_MSG_CHECKING([if compiler is using C++11 or later mode])
AC_COMPILE_IFELSE([DETECT_CPP11_PROGRAM()],
# Check if already in >= C++14 mode because of the flags returned by one of the above packages
AC_MSG_CHECKING([if compiler is using C++14 or later mode])
AC_COMPILE_IFELSE([DETECT_CPP14_PROGRAM()],
[AC_MSG_RESULT([yes])
QBT_CXX11_FOUND="yes"],
QBT_CXX14_FOUND="yes"],
[AC_MSG_RESULT([no])
QBT_CXX11_FOUND="no"])
QBT_CXX14_FOUND="no"])

# In case of no, check if the compiler can support at least C++11
# In case of no, check if the compiler can support at least C++14
# and if yes, enable it leaving a warning to the user
AS_IF([test "x$QBT_CXX11_FOUND" = "xno"],
[AC_MSG_CHECKING([if compiler supports C++11])
AS_IF([test "x$QBT_CXX14_FOUND" = "xno"],
[AC_MSG_CHECKING([if compiler supports C++14])
TMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=c++11"
AC_COMPILE_IFELSE([DETECT_CPP11_PROGRAM()],
CXXFLAGS="$CXXFLAGS -std=c++14"
AC_COMPILE_IFELSE([DETECT_CPP14_PROGRAM()],
[AC_MSG_RESULT([yes])
AC_MSG_CHECKING([if C++11 is disabled by the set compiler flags])
AC_MSG_CHECKING([if C++14 is disabled by the set compiler flags])
# prepend the flag so it won't override conflicting user defined flags
CXXFLAGS="-std=c++11 $TMP_CXXFLAGS"
AC_COMPILE_IFELSE([DETECT_CPP11_PROGRAM()],
CXXFLAGS="-std=c++14 $TMP_CXXFLAGS"
AC_COMPILE_IFELSE([DETECT_CPP14_PROGRAM()],
[AC_MSG_RESULT([no])
CXXFLAGS="$TMP_CXXFLAGS -std=c++11"
AC_MSG_WARN([C++11 mode is now force enabled.
CXXFLAGS="$TMP_CXXFLAGS -std=c++14"
AC_MSG_WARN([C++14 mode is now force enabled.
Make sure you use the same C++ mode for qBittorrent and its dependencies.
To explicitly set qBittorrent to a later mode use CXXFLAGS.
Example: `CXXFLAGS="\$CXXFLAGS -std=c++14" ./configure`])],
[AC_MSG_RESULT([yes])
AC_MSG_ERROR([The compiler supports C++11 but the user or a dependency has explicitly enabled a lower mode.])])],
AC_MSG_ERROR([The compiler supports C++14 but the user or a dependency has explicitly enabled a lower mode.])])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([A compiler supporting C++11 is required.])])
AC_MSG_ERROR([A compiler supporting C++14 is required.])])
])

# These are required because autoconf doesn't expand these **particular**
@@ -37,15 +37,15 @@ AC_DEFUN([FIND_QTDBUS],
HAVE_QTDBUS=[false]])
])

# DETECT_CPP11_PROGRAM()
# Detects if at least C++11 mode is enabled.
# DETECT_CPP14_PROGRAM()
# Detects if at least C++14 mode is enabled.
# --------------------------------------
AC_DEFUN([DETECT_CPP11_PROGRAM],
AC_DEFUN([DETECT_CPP14_PROGRAM],
[AC_LANG_PROGRAM([[
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201103L
#error "This is not a C++11 compiler"
#elif __cplusplus < 201402L
#error "This is not a C++14 compiler"
#endif]],
[[]])
])

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