From 3a31d01b49751007ee7398c5e70106bb8e39a7b5 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@anciens.enib.fr>
Date: Tue, 27 Dec 2011 14:45:03 +0100
Subject: libc/glibc: allow to selectively install headers and/or start-files

When doing multilib, we only need the headers from the default variant,
but we need the startfiles for each variants.

Allow the frontend to specify either one, or both.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/scripts/build/libc/glibc-eglibc.sh-common b/scripts/build/libc/glibc-eglibc.sh-common
index 0007dfd..062b8a2 100644
--- a/scripts/build/libc/glibc-eglibc.sh-common
+++ b/scripts/build/libc/glibc-eglibc.sh-common
@@ -77,16 +77,28 @@ do_libc_backend() {
     local multi_dir
     local multi_flags
     local extra_dir
-    local arg f fn ln pre
+    local libc_headers libc_startfiles libc_full
+    local hdr
+    local arg
 
     for arg in "$@"; do
         eval "${arg// /\\ }"
     done
 
     case "${libc_mode}" in
-        startfiles) CT_DoStep INFO "Installing C library headers & start files";;
-        final)      CT_DoStep INFO "Installing C library";;
-        *)          CT_Abort "Unsupported (or unset) libc_mode='${libc_mode}'";;
+        startfiles)
+            CT_DoStep INFO "Installing C library headers & start files"
+            hdr=y
+            libc_startfiles=y
+            libc_full=
+            ;;
+        final)
+            CT_DoStep INFO "Installing C library"
+            hdr=
+            libc_startfiles=
+            libc_full=y
+            ;;
+        *)  CT_Abort "Unsupported (or unset) libc_mode='${libc_mode}'";;
     esac
 
     # If gcc is not configured for multilib, it still prints
@@ -119,17 +131,21 @@ do_libc_backend() {
                 CT_DoExecLog ALL ln -sf "../../usr/lib/${multi_dir}" "${multi_dir}/usr/lib"
                 CT_Popd
             fi
+            libc_headers=
         else
             extra_dir=
             extra_flags=
+            libc_headers="${hdr}"
         fi
 
         mkdir -p "${CT_BUILD_DIR}/build-libc-${libc_mode}${extra_dir//\//_}"
         CT_Pushd "${CT_BUILD_DIR}/build-libc-${libc_mode}${extra_dir//\//_}"
 
-        do_libc_backend_once extra_dir="${extra_dir}"      \
-                             extra_flags="${extra_flags}"   \
-                             "$@"
+        do_libc_backend_once extra_dir="${extra_dir}"               \
+                             extra_flags="${extra_flags}"           \
+                             libc_headers="${libc_headers}"         \
+                             libc_startfiles="${libc_startfiles}"   \
+                             libc_full="${libc_full}"
 
         CT_Popd
 
@@ -160,11 +176,15 @@ do_libc_backend() {
 # This backend builds the C library once
 # Usage: do_libc_backend_once param=value [...]
 #   Parameter           : Definition                            : Type      : Default
-#   libc_mode           : 'startfiles' or 'final'               : string    : (none)
+#   libc_headers        : Build libc headers                    : bool      : n
+#   libc_startfiles     : Build libc start-files                : bool      : n
+#   libc_full           : Build full libc                       : bool      : n
 #   extra_flags         : Extra CFLAGS to use (for multilib)    : string    : (empty)
 #   extra_dir           : Extra subdir for multilib             : string    : (empty)
 do_libc_backend_once() {
-    local libc_mode
+    local libc_headers
+    local libc_startfiles
+    local libc_full
     local extra_flags
     local extra_dir
     local src_dir="${CT_SRC_DIR}/${CT_LIBC}-${CT_LIBC_VERSION}"
@@ -350,7 +370,7 @@ do_libc_backend_once() {
             ;;
     esac
 
-    if [ "${libc_mode}" = "startfiles" ]; then
+    if [ "${libc_headers}" = "y" ]; then
         CT_DoLog EXTRA "Installing C library headers"
 
         # use the 'install-headers' makefile target to install the
@@ -387,7 +407,9 @@ do_libc_backend_once() {
                     ;;
             esac
         fi
+    fi # libc_headers == y
 
+    if [ "${libc_startfiles}" = "y" ]; then
         if [ "${CT_THREADS}" = "nptl" ]; then
             CT_DoLog EXTRA "Installing C library start files"
 
@@ -410,7 +432,9 @@ do_libc_backend_once() {
                                            -x c /dev/null   \
                                            -o "${CT_SYSROOT_DIR}${extra_dir}/usr/lib/libc.so"
         fi # threads == nptl
-    else # libc_mode = final
+    fi # libc_headers == y
+
+    if [ "${libc_full}" = "y" ]; then
         CT_DoLog EXTRA "Building C library"
         CT_DoExecLog ALL make ${JOBSFLAGS}              \
                               "${extra_make_args[@]}"   \
@@ -437,7 +461,7 @@ do_libc_backend_once() {
         if [ "${CT_LIBC_LOCALES}" = "y" ]; then
             do_libc_locales
         fi
-    fi
+    fi # libc_full == y
 }
 
 # This function finishes the C library install
-- 
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