[PATCH v3 07/10] gen-version-script: parse Solaris "nm" output (Solaris support)

[Blake Jones]

The output of "nm" on Solaris is substantially different from that on
Linux, and the current version of gen-version-script is tied to the
Linux "nm" output.  This patch separates the parts of "nm" processing
which are dependent on the output format into a couple shell functions,
and makes another shell function to use the appropriate version of
"c++filt" to demangle symbols.  It also modifies lib/Makefile.local
to pass the generated symbol table correctly to the Solaris linker.
---
 lib/Makefile.local        |    4 +++
 lib/gen-version-script.sh |   50 ++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 49 insertions(+), 5 deletions(-)

diff --git a/lib/Makefile.local b/lib/Makefile.local
index 0c6b258..2068e4a 100644
--- a/lib/Makefile.local
+++ b/lib/Makefile.local
@@ -30,7 +30,11 @@ LIBRARY_SUFFIX = so
 LINKER_NAME = libnotmuch.$(LIBRARY_SUFFIX)
 SONAME = $(LINKER_NAME).$(LIBNOTMUCH_VERSION_MAJOR)
 LIBNAME = $(SONAME).$(LIBNOTMUCH_VERSION_MINOR).$(LIBNOTMUCH_VERSION_RELEASE)
+ifeq ($(PLATFORM),SOLARIS)
+LIBRARY_LINK_FLAG = -shared -Wl,-M notmuch.sym -Wl,-soname=$(SONAME) -Wl,--no-undefined -lc
+else
 LIBRARY_LINK_FLAG = -shared -Wl,--version-script=notmuch.sym,-soname=$(SONAME) -Wl,--no-undefined
+endif
 ifeq ($(PLATFORM),OPENBSD)
 LIBRARY_LINK_FLAG += -lc
 endif
diff --git a/lib/gen-version-script.sh b/lib/gen-version-script.sh
index 76670d5..ecf44f0 100644
--- a/lib/gen-version-script.sh
+++ b/lib/gen-version-script.sh
@@ -1,3 +1,4 @@
+# This script is invoked via "sh .../gen-version-script.sh".
 
 # we go through a bit of work to get the unmangled names of the
 # typeinfo symbols because of
@@ -11,10 +12,44 @@ fi
 HEADER=$1
 shift
 
+if [ `uname -s` = SunOS ] ; then
+    #
+    # Using Solaris "nm", a defined symbol looks like this:
+    #
+    # [Index]    Value    Size Type  Bind  Other Shndx   Name
+    # [15]    |    128|     16|FUNC |GLOB |0    |1      |notmuch_tags_get
+    #
+    # and an undefined symbol looks like this:
+    #
+    # [Index]    Value    Size Type  Bind  Other Shndx   Name
+    # [35]    |      0|      0|NOTY |GLOB |0    |UNDEF  |notmuch_tags_get
+    #
+    find_xapian_error() {
+	nawk -F'\|' '$7 !~ "UNDEF" && $8 ~ "Xapian.*Error" { print $8 }'
+    }
+    find_compat_syms() {
+	nawk -F'\|' '$7 !~ "UNDEF" && $8 ~ "get(line|delim)" { print $8 ";" }'
+    }
+    demangle() {
+	gc++filt "$@"
+    }
+else
+    find_xapian_error() {
+	awk '$1 ~ "^[0-9a-fA-F][0-9a-fA-F]*$" && $3 ~ "Xapian.*Error" {print $3}'
+    }
+    find_compat_syms() {
+	awk '$1 ~ "^[0-9a-fA-F][0-9a-fA-F]*$" && $2 == "T" && $3 ~ "^get(line|delim)$" {print $3 ";"}'
+    }
+    demangle() {
+	c++filt "$@"
+    }
+fi
+
 printf '{\nglobal:\n'
-nm  $* | awk '$1 ~ "^[0-9a-fA-F][0-9a-fA-F]*$" && $3 ~ "Xapian.*Error" {print $3}' | sort | uniq | \
-while read sym; do
-    demangled=$(c++filt $sym)
+
+# Find the typeinfo for "Xapian::*Error"s.
+nm $* | find_xapian_error | sort | uniq | while read sym; do
+    demangled=`demangle $sym`
     case $demangled in
 	typeinfo*) 
 	    printf "\t$sym;\n"
@@ -23,6 +58,11 @@ while read sym; do
 	    ;;
     esac
 done
-nm $* | awk '$1 ~ "^[0-9a-fA-F][0-9a-fA-F]*$" && $2 == "T" && $3 ~ "^get(line|delim)$" {print $3 ";"}'
-sed  -n 's/^[[:space:]]*\(notmuch_[a-z_]*\)[[:space:]]*(.*/ \1;/p' $HEADER
+
+# Find the "compat" syms that we need to export.
+nm $* | find_compat_syms
+
+# Finally, get the real notmuch symbols.
+sed -n 's/^[ 	]*\(notmuch_[a-z_]*\)[ 	]*(.*/ \1;/p' $HEADER
+
 printf "local: *;\n};\n"
-- 
1.7.3.2