diff mbox series

fortran: Add -static-libquadmath support [PR46539]

Message ID YvuqJyvOMhN1QSy2@tucnak
State New, archived
Headers
Series fortran: Add -static-libquadmath support [PR46539] |

Commit Message

Jakub Jelinek Aug. 16, 2022, 2:31 p.m. UTC 
  Hi!

The following patch is a revival of the
https://gcc.gnu.org/legacy-ml/gcc-patches/2014-10/msg00771.html
patch.  While trunk configured against recent glibc and with linker
--as-needed support doesn't really need to link against -lquadmath
anymore, there are still other targets where libquadmath is still in
use.
As has been discussed, making -static-libgfortran imply statically
linking both libgfortran and libquadmath is undesirable because of
the significant licensing differences between the 2 libraries.
Compared to the 2014 patch, this one doesn't handle -lquadmath
addition in the driver, which to me looks incorrect, libgfortran
configure determines where in libgfortran.spec -lquadmath should
be present if at all and with what it should be wrapper, but
analyzes gfortran -### -static-libgfortran stderr and based on
that figures out what gcc/configure.ac determined.

So far slightly tested on x86_64-linux (and will bootstrap/regtest
it there tonight), but I unfortunately don't have a way to test it
e.g. on Darwin.

Thoughts on this?

2022-08-16  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
	    Jakub Jelinek  <jakub@redhat.com>

	PR fortran/46539
gcc/
	* common.opt (static-libquadmath): New option.
	* gcc.c (driver_handle_option): Always accept -static-libquadmath.
	* config/darwin.h (LINK_SPEC): Handle -static-libquadmath.
gcc/fortran/
	* lang.opt (static-libquadmath): New option.
	* invoke.texi (-static-libquadmath): Document it.
	* options.c (gfc_handle_option): Error out if -static-libquadmath
	is passed but we do not support it.
libgfortran/
	* acinclude.m4 (LIBQUADSPEC): From $FC -static-libgfortran -###
	output determine -Bstatic/-Bdynamic, -bstatic/-bdynamic,
	-aarchive_shared/-adefault linker support or Darwin remapping
	of -lgfortran to libgfortran.a%s and use that around or instead
	of -lquadmath in LIBQUADSPEC.
	* configure: Regenerated.


	Jakub

Comments

Jakub Jelinek Aug. 17, 2022, 7:19 a.m. UTC | #1 
On Tue, Aug 16, 2022 at 04:31:03PM +0200, Jakub Jelinek via Gcc-patches wrote:
> So far slightly tested on x86_64-linux (and will bootstrap/regtest
> it there tonight), but I unfortunately don't have a way to test it

FYI, successfully bootstrapped/regtested on x86_64-linux and i686-linux.

> 2022-08-16  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
> 	    Jakub Jelinek  <jakub@redhat.com>
> 
> 	PR fortran/46539
> gcc/
> 	* common.opt (static-libquadmath): New option.
> 	* gcc.c (driver_handle_option): Always accept -static-libquadmath.
> 	* config/darwin.h (LINK_SPEC): Handle -static-libquadmath.
> gcc/fortran/
> 	* lang.opt (static-libquadmath): New option.
> 	* invoke.texi (-static-libquadmath): Document it.
> 	* options.c (gfc_handle_option): Error out if -static-libquadmath
> 	is passed but we do not support it.
> libgfortran/
> 	* acinclude.m4 (LIBQUADSPEC): From $FC -static-libgfortran -###
> 	output determine -Bstatic/-Bdynamic, -bstatic/-bdynamic,
> 	-aarchive_shared/-adefault linker support or Darwin remapping
> 	of -lgfortran to libgfortran.a%s and use that around or instead
> 	of -lquadmath in LIBQUADSPEC.
> 	* configure: Regenerated.

	Jakub
Tobias Burnus Aug. 17, 2022, 7:55 a.m. UTC | #2 
On 16.08.22 16:31, Jakub Jelinek via Gcc-patches wrote:
> The following patch is a revival of the
> https://gcc.gnu.org/legacy-ml/gcc-patches/2014-10/msg00771.html
> patch.  While trunk configured against recent glibc and with linker
> --as-needed support doesn't really need to link against -lquadmath
> anymore, there are still other targets where libquadmath is still in
> use.
> As has been discussed, making -static-libgfortran imply statically
> linking both libgfortran and libquadmath is undesirable because of
> the significant licensing differences between the 2 libraries.
> [...]
> So far slightly tested on x86_64-linux (and will bootstrap/regtest
> it there tonight), but I unfortunately don't have a way to test it
> e.g. on Darwin.
>
> Thoughts on this?

Looks good to me – with the caveat of having only limited knowledge of
.spec and Darwin.

> --- gcc/fortran/invoke.texi.jj        2022-05-09 09:09:20.312473272 +0200
> +++ gcc/fortran/invoke.texi   2022-08-16 16:12:47.638203577 +0200
...
> +Please note that the @file{libquadmath} runtime library is licensed under the
> +GNU Lesser General Public License (LGPL), and linking it statically introduces
> +requirements on redistributing the resulting binaries.

"on redistributing" sounds odd to me – "when redistributing" or "on
(the) redistribution of" sounds better to me.

Tobias
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Mikael Morin Aug. 17, 2022, 8:28 a.m. UTC | #3 
Hello,

Tobias approved it already, but I spotted what looks like typos.
See below.

Mikael

> gcc/
> 	* common.opt (static-libquadmath): New option.
> 	* gcc.c (driver_handle_option): Always accept -static-libquadmath.
> 	* config/darwin.h (LINK_SPEC): Handle -static-libquadmath.

(...)

> --- gcc/config/darwin.h.jj	2022-08-16 14:51:14.529544492 +0200
> +++ gcc/config/darwin.h	2022-08-16 14:53:54.402460097 +0200
> @@ -443,6 +443,7 @@ extern GTY(()) int darwin_ms_struct;
>                        %:replace-outfile(-lobjc libobjc-gnu.a%s); \
>                       :%:replace-outfile(-lobjc -lobjc-gnu )}}\
>      %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
> +   %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lquadmath libquadmath.a%s)}\

s/static-libgfortran/static-libquadmath/ I guess?  Otherwise I don’t 
understand the corresponding ChangeLog description.

>      %{static|static-libgcc|static-libphobos:%:replace-outfile(-lgphobos libgphobos.a%s)}\
>      %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
>      %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\

(...)

> --- libgfortran/acinclude.m4.jj	2022-06-29 17:05:45.478790781 +0200
> +++ libgfortran/acinclude.m4	2022-08-16 16:06:50.047814043 +0200
> @@ -356,18 +356,39 @@ AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
>         ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
>       ])
>   
> +    dnl Determine -Bstatic ... -Bdynamic etc. support from gfortran -### stderr.
> +    touch conftest1.$ac_objext conftest2.$ac_objext
> +    LQUADMATH=-lquadmath
> +    $FC -static-libgfortran -### -o conftest \
> +	conftest1.$ac_objext -lgfortran conftest2.$ac_objext 2>&1 >/dev/null \
> +	| grep "conftest1.$ac_objext.*conftest2.$ac_objext" > conftest.cmd
> +    if grep "conftest1.$ac_objext.* -Bstatic -lgfortran -Bdynamic .*conftest2.$ac_objext" \
> +       conftest.cmd >/dev/null 2>&1; then
> +      LQUADMATH="%{static-libquadmath:-Bstatic} -lquadmath %{static-libquadmath:-Bdynamic}"
> +    elif grep "conftest1.$ac_objext.* -bstatic -lgfortran -bdynamic .*conftest2.$ac_objext" \
> +         conftest.cmd >/dev/null 2>&1; then
> +      LQUADMATH="%{static-libquadmath:-bstatic} -lquadmath %{static-libquadmath:-bdynamic}"
> +    elif grep "conftest1.$ac_objext.* -aarchive_shared -lgfortran -adefault .*conftest2.$ac_objext" \
> +         conftest.cmd >/dev/null 2>&1; then
> +      LQUADMATH="%{static-libquadmath:-aarchive_shared} -lquadmath %{static-libquadmath:-adefault}"
> +    elif grep "conftest1.$ac_objext.* ligfortran.a .*conftest2.$ac_objext" \

s/ligfortran.a/libgfortran.a/

> +         conftest.cmd >/dev/null 2>&1; then
> +      LQUADMATH="%{static-libquadmath:libquadmath.a%s;:-lquadmath}"
> +    fi
> +    rm -f conftest1.$ac_objext conftest2.$ac_objext conftest conftest.cmd
> +
>       dnl For static libgfortran linkage, depend on libquadmath only if needed.
>       dnl If using *f128 APIs from libc/libm, depend on libquadmath only if needed
>       dnl even for dynamic libgfortran linkage, and don't link libgfortran against
>       dnl -lquadmath.
>       if test "x$libgfor_cv_have_as_needed" = xyes; then
>         if test "x$USE_IEC_60559" = xyes; then
> -	LIBQUADSPEC="$libgfor_cv_as_needed_option -lquadmath $libgfor_cv_no_as_needed_option"
> +	LIBQUADSPEC="$libgfor_cv_as_needed_option $LQUADMATH $libgfor_cv_no_as_needed_option"
>         else
> -	LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
> +	LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} $LQUADMATH %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
>         fi
>       else
> -      LIBQUADSPEC="-lquadmath"
> +      LIBQUADSPEC="$LQUADMATH"
>       fi
>       if test "x$USE_IEC_60559" != xyes; then
>         if test -f ../libquadmath/libquadmath.la; then
diff mbox series

Patch

--- gcc/common.opt.jj	2022-06-27 11:18:02.050066582 +0200
+++ gcc/common.opt	2022-08-16 14:51:04.611673800 +0200
@@ -3601,6 +3601,10 @@  static-libphobos
 Driver
 ; Documented for D, but always accepted by driver.
 
+static-libquadmath
+Driver
+; Documented for Fortran, but always accepted by driver.
+
 static-libstdc++
 Driver
 
--- gcc/gcc.cc.jj	2022-08-11 09:57:24.765334380 +0200
+++ gcc/gcc.cc	2022-08-16 14:57:54.708327024 +0200
@@ -4585,12 +4585,14 @@  driver_handle_option (struct gcc_options
     case OPT_static_libgcc:
     case OPT_shared_libgcc:
     case OPT_static_libgfortran:
+    case OPT_static_libquadmath:
     case OPT_static_libphobos:
     case OPT_static_libstdc__:
       /* These are always valid, since gcc.cc itself understands the
 	 first two, gfortranspec.cc understands -static-libgfortran,
-	 d-spec.cc understands -static-libphobos, and g++spec.cc
-	 understands -static-libstdc++ */
+	 d-spec.cc understands -static-libphobos, g++spec.cc
+	 understands -static-libstdc++ and libgfortran.spec handles
+	 -static-libquadmath.  */
       validated = true;
       break;
 
--- gcc/config/darwin.h.jj	2022-08-16 14:51:14.529544492 +0200
+++ gcc/config/darwin.h	2022-08-16 14:53:54.402460097 +0200
@@ -443,6 +443,7 @@  extern GTY(()) int darwin_ms_struct;
                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
                     :%:replace-outfile(-lobjc -lobjc-gnu )}}\
    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
+   %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lquadmath libquadmath.a%s)}\
    %{static|static-libgcc|static-libphobos:%:replace-outfile(-lgphobos libgphobos.a%s)}\
    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
--- gcc/fortran/lang.opt.jj	2022-02-04 14:36:55.050604670 +0100
+++ gcc/fortran/lang.opt	2022-08-16 14:52:52.459267705 +0200
@@ -863,6 +863,10 @@  static-libgfortran
 Fortran
 Statically link the GNU Fortran helper library (libgfortran).
 
+static-libquadmath
+Fortran
+Statically link the GCC Quad-Precision Math Library (libquadmath).
+
 std=f2003
 Fortran
 Conform to the ISO Fortran 2003 standard.
--- gcc/fortran/options.cc.jj	2022-01-18 11:58:59.568982256 +0100
+++ gcc/fortran/options.cc	2022-08-16 14:56:22.807525218 +0200
@@ -692,6 +692,13 @@  gfc_handle_option (size_t scode, const c
 #endif
       break;
 
+    case OPT_static_libquadmath:
+#ifndef HAVE_LD_STATIC_DYNAMIC
+      gfc_fatal_error ("%<-static-libquadmath%> is not supported in this "
+		       "configuration");
+#endif
+      break;
+
     case OPT_fintrinsic_modules_path:
     case OPT_fintrinsic_modules_path_:
 
--- gcc/fortran/invoke.texi.jj	2022-05-09 09:09:20.312473272 +0200
+++ gcc/fortran/invoke.texi	2022-08-16 16:12:47.638203577 +0200
@@ -170,7 +170,7 @@  and warnings}.
 
 @item Link Options
 @xref{Link Options,,Options for influencing the linking step}.
-@gccoptlist{-static-libgfortran}
+@gccoptlist{-static-libgfortran  -static-libquadmath}
 
 @item Runtime Options
 @xref{Runtime Options,,Options for influencing runtime behavior}.
@@ -1425,6 +1425,20 @@  configured, this option has no effect.
 @end table
 
 
+@table @gcctabopt
+@item -static-libquadmath
+@opindex @code{static-libquadmath}
+On systems that provide @file{libquadmath} as a shared and a static
+library, this option forces the use of the static version. If no
+shared version of @file{libquadmath} was built when the compiler was
+configured, this option has no effect.
+
+Please note that the @file{libquadmath} runtime library is licensed under the
+GNU Lesser General Public License (LGPL), and linking it statically introduces
+requirements on redistributing the resulting binaries.
+@end table
+
+
 @node Runtime Options
 @section Influencing runtime behavior
 @cindex options, runtime
--- libgfortran/acinclude.m4.jj	2022-06-29 17:05:45.478790781 +0200
+++ libgfortran/acinclude.m4	2022-08-16 16:06:50.047814043 +0200
@@ -356,18 +356,39 @@  AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
       ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
     ])
 
+    dnl Determine -Bstatic ... -Bdynamic etc. support from gfortran -### stderr.
+    touch conftest1.$ac_objext conftest2.$ac_objext
+    LQUADMATH=-lquadmath
+    $FC -static-libgfortran -### -o conftest \
+	conftest1.$ac_objext -lgfortran conftest2.$ac_objext 2>&1 >/dev/null \
+	| grep "conftest1.$ac_objext.*conftest2.$ac_objext" > conftest.cmd
+    if grep "conftest1.$ac_objext.* -Bstatic -lgfortran -Bdynamic .*conftest2.$ac_objext" \
+       conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:-Bstatic} -lquadmath %{static-libquadmath:-Bdynamic}"
+    elif grep "conftest1.$ac_objext.* -bstatic -lgfortran -bdynamic .*conftest2.$ac_objext" \
+         conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:-bstatic} -lquadmath %{static-libquadmath:-bdynamic}"
+    elif grep "conftest1.$ac_objext.* -aarchive_shared -lgfortran -adefault .*conftest2.$ac_objext" \
+         conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:-aarchive_shared} -lquadmath %{static-libquadmath:-adefault}"
+    elif grep "conftest1.$ac_objext.* ligfortran.a .*conftest2.$ac_objext" \
+         conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:libquadmath.a%s;:-lquadmath}"
+    fi
+    rm -f conftest1.$ac_objext conftest2.$ac_objext conftest conftest.cmd
+
     dnl For static libgfortran linkage, depend on libquadmath only if needed.
     dnl If using *f128 APIs from libc/libm, depend on libquadmath only if needed
     dnl even for dynamic libgfortran linkage, and don't link libgfortran against
     dnl -lquadmath.
     if test "x$libgfor_cv_have_as_needed" = xyes; then
       if test "x$USE_IEC_60559" = xyes; then
-	LIBQUADSPEC="$libgfor_cv_as_needed_option -lquadmath $libgfor_cv_no_as_needed_option"
+	LIBQUADSPEC="$libgfor_cv_as_needed_option $LQUADMATH $libgfor_cv_no_as_needed_option"
       else
-	LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
+	LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} $LQUADMATH %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
       fi
     else
-      LIBQUADSPEC="-lquadmath"
+      LIBQUADSPEC="$LQUADMATH"
     fi
     if test "x$USE_IEC_60559" != xyes; then
       if test -f ../libquadmath/libquadmath.la; then
--- libgfortran/configure.jj	2022-06-29 17:05:45.483790716 +0200
+++ libgfortran/configure	2022-08-16 16:06:54.119761574 +0200
@@ -30323,14 +30323,34 @@  fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgfor_cv_have_as_needed" >&5
 $as_echo "$libgfor_cv_have_as_needed" >&6; }
 
+        touch conftest1.$ac_objext conftest2.$ac_objext
+    LQUADMATH=-lquadmath
+    $FC -static-libgfortran -### -o conftest \
+	conftest1.$ac_objext -lgfortran conftest2.$ac_objext 2>&1 >/dev/null \
+	| grep "conftest1.$ac_objext.*conftest2.$ac_objext" > conftest.cmd
+    if grep "conftest1.$ac_objext.* -Bstatic -lgfortran -Bdynamic .*conftest2.$ac_objext" \
+       conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:-Bstatic} -lquadmath %{static-libquadmath:-Bdynamic}"
+    elif grep "conftest1.$ac_objext.* -bstatic -lgfortran -bdynamic .*conftest2.$ac_objext" \
+         conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:-bstatic} -lquadmath %{static-libquadmath:-bdynamic}"
+    elif grep "conftest1.$ac_objext.* -aarchive_shared -lgfortran -adefault .*conftest2.$ac_objext" \
+         conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:-aarchive_shared} -lquadmath %{static-libquadmath:-adefault}"
+    elif grep "conftest1.$ac_objext.* ligfortran.a .*conftest2.$ac_objext" \
+         conftest.cmd >/dev/null 2>&1; then
+      LQUADMATH="%{static-libquadmath:libquadmath.a%s;:-lquadmath}"
+    fi
+    rm -f conftest1.$ac_objext conftest2.$ac_objext conftest conftest.cmd
+
                     if test "x$libgfor_cv_have_as_needed" = xyes; then
       if test "x$USE_IEC_60559" = xyes; then
-	LIBQUADSPEC="$libgfor_cv_as_needed_option -lquadmath $libgfor_cv_no_as_needed_option"
+	LIBQUADSPEC="$libgfor_cv_as_needed_option $LQUADMATH $libgfor_cv_no_as_needed_option"
       else
-	LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
+	LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} $LQUADMATH %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
       fi
     else
-      LIBQUADSPEC="-lquadmath"
+      LIBQUADSPEC="$LQUADMATH"
     fi
     if test "x$USE_IEC_60559" != xyes; then
       if test -f ../libquadmath/libquadmath.la; then