[gcc r11-8068] libstdc++: Improve error reporting if PDF generation fails

[Jonathan Wakely <redi@gcc.gnu.org>]

https://gcc.gnu.org/g:be8d5f99f50cf282c21632e60fe1d8857bb5a554

commit r11-8068-gbe8d5f99f50cf282c21632e60fe1d8857bb5a554
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Apr 8 18:37:59 2021 +0100

    libstdc++: Improve error reporting if PDF generation fails
    
    If pdflatex runs out of memory the build fails with no hint what's
    wrong. This adds another grep command to the makefile so that an
    out-of-memory error will result in more information being shown.
    
    As suggested in https://bugzilla.redhat.com/show_bug.cgi?id=1841056
    using lualatex can be used as a workaround.
    
    libstdc++-v3/ChangeLog:
    
            * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
            out-of-memory error in log file.
            * doc/Makefile.in: Regenerate.

Diff:
---
 libstdc++-v3/doc/Makefile.am | 1 +
 libstdc++-v3/doc/Makefile.in | 1 +
 2 files changed, 2 insertions(+)

diff --git a/libstdc++-v3/doc/Makefile.am b/libstdc++-v3/doc/Makefile.am
index 2e0eb187f91..cb9b68ffaea 100644
--- a/libstdc++-v3/doc/Makefile.am
+++ b/libstdc++-v3/doc/Makefile.am
@@ -267,6 +267,7 @@ stamp-pdf-doxygen: stamp-latex-doxygen ${doxygen_outdir}/pdf
 	else \
 	  echo "... error"; \
 	  grep -F 'LaTeX Error' ${doxygen_outdir}/latex/refman.log; \
+	  grep -F 'TeX capacity exceeded, sorry' ${doxygen_outdir}/latex/refman.log; \
 	  exit 12; \
 	fi
 	$(STAMP) stamp-pdf-doxygen
diff --git a/libstdc++-v3/doc/Makefile.in b/libstdc++-v3/doc/Makefile.in
index 7681908103a..956b641c1aa 100644
--- a/libstdc++-v3/doc/Makefile.in
+++ b/libstdc++-v3/doc/Makefile.in
@@ -958,6 +958,7 @@ stamp-pdf-doxygen: stamp-latex-doxygen ${doxygen_outdir}/pdf
 	else \
 	  echo "... error"; \
 	  grep -F 'LaTeX Error' ${doxygen_outdir}/latex/refman.log; \
+	  grep -F 'TeX capacity exceeded, sorry' ${doxygen_outdir}/latex/refman.log; \
 	  exit 12; \
 	fi
 	$(STAMP) stamp-pdf-doxygen