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build,qt: Build Qt with -fPIC if required or requested

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* configure.ac: Add option to enable building the Qt 6 binding with
-fPIC. Fix typo and mention default for --enable-no-direct-extern-access
option.
* m4/qt6.m4: Add -fPIC to GPGME_QT6_CFLAGS if requested or if Qt 6 was
built with reduce_relocations.
--

GnuPG-bug-id: 6781
This commit is contained in:
Ingo Klöcker 2023-10-30 09:28:54 +01:00
parent cf88690cf4
commit ae332749ee
No known key found for this signature in database
GPG Key ID: F5A5D1692277A1E9
3 changed files with 45 additions and 13 deletions
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3
NEWS
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@ -4,6 +4,9 @@ Noteworthy changes in version 1.23.2 (unreleased)
* qt: Use a temporary file name when creating signed or encrypted
archives. [T6721]
* qt: Build Qt 6 bindings with -fPIC if requested or Qt 6 was built with
this flag. [T6781]
Noteworthy changes in version 1.23.1 (2023-10-27)
-------------------------------------------------

16
configure.ac
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@ -338,6 +338,18 @@ if test x$fixed_search_path != x ; then
[Locate binaries only via this PATH])
fi
# Option --enable-reduce-relocations
#
# Allow building the Qt 6 bindings explicitly with -fPIC if the automatic
# detection fails. Note: We assume that this flag is always available (unless
# we built for Windows).
AC_ARG_ENABLE([reduce-relocations],
AS_HELP_STRING([--enable-reduce-relocations],
[build Qt 6 bindings with -fPIC (default is
auto)]),
[use_reduce_relocations="$enableval"],
[use_reduce_relocations=""])
# Option --enable-no-direct-extern-access
#
# Some distributions build Qt 6 with -mno-direct-extern-access. Libraries and
@ -352,8 +364,8 @@ AX_CHECK_COMPILE_FLAG([-mno-direct-extern-access],
AC_LANG_POP()
AC_ARG_ENABLE([no-direct-extern-access],
AS_HELP_STRING([--enable-no-direct-extern-access],
[build Qt 6 bindinds with
-mno-direct-extern-access]),
[build Qt 6 bindings with
-mno-direct-extern-access (default is auto)]),
[use_no_direct_extern_access="$enableval"],
[use_no_direct_extern_access=""])

39
m4/qt6.m4
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@ -34,20 +34,37 @@ AC_DEFUN([FIND_QT6],
fi
if test "$have_qt6_libs" = "yes"; then
if test "$have_w32_system" != yes; then
mkspecsdir=$($PKG_CONFIG --variable mkspecsdir Qt6Platform)
if test -z "$mkspecsdir"; then
AC_MSG_WARN([Failed to determine Qt's mkspecs directory. Cannot check its build configuration.])
fi
fi
# check if we need -fPIC
if test -z "$use_reduce_relocations" && test -n "$mkspecsdir"; then
AC_MSG_CHECKING([whether Qt was built with -fPIC])
if grep -q "QT_CONFIG .* reduce_relocations" $mkspecsdir/qconfig.pri; then
use_reduce_relocations="yes"
else
use_reduce_relocations="no"
fi
AC_MSG_RESULT([$use_reduce_relocations])
fi
if test "$use_reduce_relocations" = yes; then
GPGME_QT6_CFLAGS="$GPGME_QT6_CFLAGS -fPIC"
fi
# check if we need -mno-direct-extern-access
if test "$have_no_direct_extern_access" = yes; then
if test -z "$use_no_direct_extern_access" && test "$have_w32_system" != yes; then
mkspecsdir=$($PKG_CONFIG --variable mkspecsdir Qt6Platform)
if test -n "$mkspecsdir"; then
AC_MSG_CHECKING([whether Qt was built with -mno-direct-extern-access])
if grep -q "QT_CONFIG .* no_direct_extern_access" $mkspecsdir/qconfig.pri; then
use_no_direct_extern_access="yes"
else
use_no_direct_extern_access="no"
fi
AC_MSG_RESULT([$use_no_direct_extern_access])
if test -z "$use_no_direct_extern_access" && test -n "$mkspecsdir"; then
AC_MSG_CHECKING([whether Qt was built with -mno-direct-extern-access])
if grep -q "QT_CONFIG .* no_direct_extern_access" $mkspecsdir/qconfig.pri; then
use_no_direct_extern_access="yes"
else
AC_MSG_WARN([Failed to determine Qt's mkspecs directory. Cannot check its build configuration.])
use_no_direct_extern_access="no"
fi
AC_MSG_RESULT([$use_no_direct_extern_access])
fi
if test "$use_no_direct_extern_access" = yes; then
GPGME_QT6_CFLAGS="$GPGME_QT6_CFLAGS -mno-direct-extern-access"