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Message-Id: <1435525701-64741-1-git-send-email-hi@shiz.me>
Date: Sun, 28 Jun 2015 23:08:19 +0200
From: Shiz <hi@...z.me>
To: musl@...ts.openwall.com
Subject: [PATCH v3 1/3] build: overhaul wrapper script system for multiple wrapper support
this overhauls part of the build system in order to support multiple
toolchain wrapper scripts, as opposed to solely the musl-gcc wrapper as
before. it thereby replaces --enable-gcc-wrapper with --enable-wrapper=...,
which has the options 'auto' (the default, detect whether to use wrappers),
'all' (build and install all wrappers), 'no' (don't build any) and finally
the options named after the individual compiler scripts (currently only
'gcc' is available) to build and install only that wrapper.
the old --enable-gcc-wrapper is removed from --help, but still available.
it also modifies the wrappers to use the C compiler specified to the build
system as 'inner' compiler, when applicable. as wrapper detection works by
probing this compiler, it may not work with any other.
---
Makefile | 4 +++-
configure | 58 +++++++++++++++++++++++++++++++++++++---------------------
2 files changed, 40 insertions(+), 22 deletions(-)
diff --git a/Makefile b/Makefile
index 2eb7b30..a1c1928 100644
--- a/Makefile
+++ b/Makefile
@@ -51,6 +51,8 @@ TOOL_LIBS = lib/musl-gcc.specs
ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
ALL_TOOLS = tools/musl-gcc
+WRAPCC_GCC = gcc
+
LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
-include config.mak
@@ -155,7 +157,7 @@ lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
tools/musl-gcc: config.mak
- printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
+ printf '#!/bin/sh\nexec "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
chmod +x $@
$(DESTDIR)$(bindir)/%: tools/%
diff --git a/configure b/configure
index 7b29ae4..e3d4ab4 100755
--- a/configure
+++ b/configure
@@ -28,7 +28,7 @@ Optional features:
--enable-debug build with debugging information [disabled]
--enable-warnings build with recommended warnings flags [disabled]
--enable-visibility use global visibility options to optimize PIC [auto]
- --enable-gcc-wrapper build musl-gcc toolchain wrapper [auto]
+ --enable-wrapper=... build given musl toolchain wrapper [auto]
--disable-shared inhibit building shared library [enabled]
--disable-static inhibit building static library [enabled]
@@ -123,6 +123,8 @@ bindir='$(exec_prefix)/bin'
libdir='$(prefix)/lib'
includedir='$(prefix)/include'
syslibdir='/lib'
+tools=
+tool_libs=
target=
optimize=auto
debug=no
@@ -131,6 +133,7 @@ visibility=auto
shared=auto
static=yes
wrapper=auto
+gcc_wrapper=no
for arg ; do
case "$arg" in
@@ -154,7 +157,11 @@ case "$arg" in
--disable-warnings|--enable-warnings=no) warnings=no ;;
--enable-visibility|--enable-visibility=yes) visibility=yes ;;
--disable-visibility|--enable-visibility=no) visibility=no ;;
---enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ;;
+--enable-wrapper|--enable-wrapper=yes) wrapper=detect ;;
+--enable-wrapper=all) wrapper=yes ; gcc_wrapper=yes ;;
+--enable-wrapper=gcc) wrapper=yes ; gcc_wrapper=yes ;;
+--disable-wrapper|--enable-wrapper=no) wrapper=no ;;
+--enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ; gcc_wrapper=yes ;;
--disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;;
--enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;;
--host=*|--target=*) target=${arg#*=} ;;
@@ -207,7 +214,7 @@ exit 1
fi
#
-# Figure out options to force errors on unknown flags.
+# Figure out options to force errors on unknown flags
#
tryflag CFLAGS_TRY -Werror=unknown-warning-option
tryflag CFLAGS_TRY -Werror=unused-command-line-argument
@@ -215,36 +222,44 @@ tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
#
-# Need to know if the compiler is gcc to decide whether to build the
-# musl-gcc wrapper, and for critical bug detection in some gcc versions.
+# Need to know if the compiler is gcc or clang to decide which toolchain
+# wrappers to build.
#
-printf "checking whether compiler is gcc... "
-if fnmatch '*gcc\ version*' "$(LC_ALL=C $CC -v 2>&1)" ; then
-cc_is_gcc=yes
-else
-cc_is_gcc=no
+printf "checking for C compiler family... "
+cc_ver="$(LC_ALL=C $CC -v 2>&1)"
+cc_family=unknown
+if fnmatch '*gcc\ version*' "$cc_ver" ; then
+cc_family=gcc
fi
-echo "$cc_is_gcc"
+echo "$cc_family"
#
-# Only build musl-gcc wrapper if toolchain does not already target musl
+# Figure out toolchain wrapper to build
#
+if test "$wrapper" = auto -o "$wrapper" = detect ; then
+printf "checking for toolchain wrapper to build... "
+if test "$cc_family" = gcc ; then
+gcc_wrapper=yes
if test "$wrapper" = auto ; then
-printf "checking whether to build musl-gcc wrapper... "
-if test "$cc_is_gcc" = yes ; then
-wrapper=yes
while read line ; do
-case "$line" in */ld-musl-*) wrapper=no ;; esac
+case "$line" in */ld-musl-*) gcc_wrapper=no ;; esac
done <<EOF
$($CC -dumpspecs)
EOF
+fi
+test "$gcc_wrapper" = yes && echo "gcc"
else
-wrapper=no
+echo "none"
+if test "$wrapper" = detect ; then
+fail "$0: could not find an appropriate toolchain wrapper"
+fi
fi
-echo "$wrapper"
fi
-
+if test "$gcc_wrapper" = yes ; then
+tools="$tools tools/musl-gcc"
+tool_libs="$tool_libs lib/musl-gcc.specs"
+fi
#
# Find the target architecture
@@ -580,11 +595,12 @@ LDFLAGS = $LDFLAGS_AUTO $LDFLAGS
CROSS_COMPILE = $CROSS_COMPILE
LIBCC = $LIBCC
OPTIMIZE_GLOBS = $OPTIMIZE_GLOBS
+ALL_TOOLS = $tools
+TOOL_LIBS = $tool_libs
EOF
test "x$static" = xno && echo "STATIC_LIBS ="
test "x$shared" = xno && echo "SHARED_LIBS ="
-test "x$wrapper" = xno && echo "ALL_TOOLS ="
-test "x$wrapper" = xno && echo "TOOL_LIBS ="
+test "x$cc_family" = xgcc && echo 'WRAPCC_GCC = $(CC)'
exec 1>&3 3>&-
printf "done\n"
--
2.3.6
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