[adwaita-icon-theme: 1/2] reduce build parallelism

[Jakub Steiner <jimmac src gnome org>]

commit 27edeca7927eb2247d7385fccb3f0fd7787471e6
Author: Vladimír Čunát <v cunat cz>
Date:   Mon May 16 22:31:06 2022 +0200

    reduce build parallelism
    
    The nested for-loops spawned child processes in an unbounded fashion,
    so let's wait at the end of each inner loop as a compromise.
    On my Linux 16-threaded machine the whole build process
    gets slowed down by this from 43 seconds to 64; sounds OK to me.
    
    This should avoid repeated failures we now keep seeing elsewhere
    > install-sh: fork: retry: Resource temporarily unavailable
    
    The parallelism was introduced in commit a2f3046d (MR !39).

 src/fullcolor/Makefile.am | 1 +
 src/symbolic/Makefile.am  | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/fullcolor/Makefile.am b/src/fullcolor/Makefile.am
index b7d0808bd..4fe02f39c 100644
--- a/src/fullcolor/Makefile.am
+++ b/src/fullcolor/Makefile.am
@@ -11,6 +11,7 @@ install-data-local:
                        $(mkdir_p) $(DESTDIR)$(themedir)/$$size/$$context; \
                        $(install_sh_DATA) $(top_srcdir)/$(SVGOUTDIR)/$$size/$$file 
$(DESTDIR)$(themedir)/$$size/$$file & \
                done; \
+               wait; \
        done; \
        wait
 
diff --git a/src/symbolic/Makefile.am b/src/symbolic/Makefile.am
index e1f88183b..f1a46c3c0 100644
--- a/src/symbolic/Makefile.am
+++ b/src/symbolic/Makefile.am
@@ -36,6 +36,7 @@ install-data-local:
                        $(mkdir_p) $(DESTDIR)$(themedir)/$$size/$$context; \
                        $(install_sh_DATA) $(top_srcdir)/$(SVGOUTDIR)/$$size/$$file 
$(DESTDIR)$(themedir)/$$size/$$file & \
                done; \
+               wait; \
        done; \
        for file in `cd $(top_srcdir)/$(SVGOUTDIR)/scalable; find . -name "*.svg"`; do \
                context="`dirname $$file`"; \
@@ -44,7 +45,8 @@ install-data-local:
                for size in $(symbolic_encode_sizes); do \
                        $(mkdir_p) $(DESTDIR)$(themedir)/$$size/$$context; \
                        $(GTK_ENCODE_SYMBOLIC_SVG) $(top_srcdir)/$(SVGOUTDIR)/scalable/$$file $$size -o 
$(DESTDIR)$(themedir)/$$size/$$context & \
-               done \
+               done; \
+               wait; \
        done; \
        wait