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--- sendmail-8.18.1/devtools/M4/UNIX/sharedlib.m4 2024-01-31 08:38:32.000000000 +0200
+++ sendmail-8.18.1/devtools//M4/UNIX/sharedlib.m4.new 2025-08-23 20:17:46.452303781 +0200
@@ -16,14 +16,26 @@
define(`confLIBEXT', `a')dnl
+divert(-1)
+#
+# For the sake of version numbering for Linux, the following small C programme (source: Fedora, slightly modified) will extract the milter version number from the file `include/libmilter/mfapi.h'
+# SUFFIX has to be the FULL VERSION, as it is used for building the final library file. It starts with a "."
+# SOVER is the library's major version number
+divert(0)
+
+define(`runCtest', `esyscmd(`echo -e "#include <stdio.h>\n#include <stdbool.h>\n#include \"../include/libmilter/mfapi.h\"\nint main(void){'$1`;return 0;}" | gcc -x c -I../include -o ctest - && ./ctest && rm -f ctest')')dnl
+define(`confSHAREDLIB_SUFFIX', runCtest(`printf(\".%d.%d.%d\", SM_LM_VRS_MAJOR(SMFI_VERSION), SM_LM_VRS_MINOR(SMFI_VERSION), SM_LM_VRS_PLVL(SMFI_VERSION))'))dnl
+define(`confSHAREDLIB_SOVER', runCtest(`printf(\"%d\", SM_LM_VRS_MAJOR(SMFI_VERSION))'))dnl
+
SHAREDLIB_SUFFIX= ifdef(`confSHAREDLIB_SUFFIX', `confSHAREDLIB_SUFFIX', `')
SHAREDLIB_EXT= ifdef(`confSHAREDLIB_EXT', `confSHAREDLIB_EXT', `.so')
SHAREDLIB= bldCURRENT_PRODUCT${SHAREDLIB_EXT}${SHAREDLIB_SUFFIX}
SHAREDLIB_LINK= bldCURRENT_PRODUCT${SHAREDLIB_EXT}
SHAREDLIBDIR= ifdef(`confSHAREDLIBDIR',`confSHAREDLIBDIR',`/usr/lib/')
DEPLIBS= ifdef(`confDEPLIBS', `confDEPLIBS', `') ${bldCURRENT_PRODUCT`SMDEPLIBS'}
+SHAREDLIB_SOVER=ifdef(`confSHAREDLIB_SOVER', ${SHAREDLIB_LINK}.`confSHAREDLIB_SOVER', `')
-CONFIG_SONAME= ifdef(`confSONAME', `confSONAME ${SHAREDLIB}', `')
+CONFIG_SONAME= ifdef(`confSONAME', defn(`confSONAME')${SHAREDLIB_SOVER}, `')
include(confBUILDTOOLSDIR`/M4/'bldM4_TYPE_DIR`/links.m4')dnl
bldLIST_PUSH_ITEM(`bldC_PRODUCTS', bldCURRENT_PRODUCT)dnl
@@ -45,6 +57,11 @@
${AR} ${AROPTS} bldCURRENT_PRODUCT.a shr.o
${CP} bldCURRENT_PRODUCT.a ${SHAREDLIB}',`rm -f bldCURRENT_PRODUCT${SHAREDLIB_EXT}
${LN} ${SHAREDLIB} bldCURRENT_PRODUCT${SHAREDLIB_EXT}')
+ ifelse(bldOS, `Linux',
+ rm -f bldCURRENT_PRODUCT${SHAREDLIB_EXT}
+ ${LN} ${LNOPTS} ${SHAREDLIB} ${SHAREDLIB_SOVER}
+ ${LN} ${LNOPTS} ${SHAREDLIB_SOVER} ${SHAREDLIB_LINK}
+ )
bldCURRENT_PRODUCT.a: ${BEFORE} ${bldCURRENT_PRODUCT`OBJS'}
${AR} ${AROPTS} bldCURRENT_PRODUCT.a ${bldCURRENT_PRODUCT`OBJS'}
@@ -52,11 +69,19 @@
ifdef(`bldLINK_SOURCES', `bldMAKE_SOURCE_LINKS(bldLINK_SOURCES)')
-install-`'bldCURRENT_PRODUCT: ${SHAREDLIB}
+install-`'bldCURRENT_PRODUCT: ${SHAREDLIB} bldCURRENT_PRODUCT.a
ifdef(`confMKDIR', `if [ ! -d ${DESTDIR}${SHAREDLIBDIR} ]; then confMKDIR -p ${DESTDIR}${SHAREDLIBDIR}; else :; fi ')
${INSTALL} -c -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} ${SHAREDLIB} ${DESTDIR}${SHAREDLIBDIR}
ifelse(bldOS, `AIX', `${AR} ${AROPTS} ${DESTDIR}${SHAREDLIBDIR}bldCURRENT_PRODUCT.a ${SHAREDLIB}', `rm -f ${DESTDIR}${SHAREDLIBDIR}${SHAREDLIB_LINK}
${LN} ${LNOPTS} ${DESTDIR}${SHAREDLIBDIR}${SHAREDLIB} ${DESTDIR}${SHAREDLIBDIR}${SHAREDLIB_LINK}')
+ ifelse(bldOS, `Linux',
+ cd ${DESTDIR}${SHAREDLIBDIR} && { \
+ rm -f ${SHAREDLIB_LINK}; \
+ ${LN} ${LNOPTS} ${SHAREDLIB} ${SHAREDLIB_SOVER}; \
+ ${LN} ${LNOPTS} ${SHAREDLIB_SOVER} ${SHAREDLIB_LINK}; \
+ }
+ ${INSTALL} -c -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} bldCURRENT_PRODUCT.a "${DESTDIR}${LIBDIR}"
+ )
bldCURRENT_PRODUCT-clean:
rm -f ${OBJS} ${SHAREDLIB} bldCURRENT_PRODUCT.a ${MANPAGES} ifelse(bldOS, `AIX', `shr.o', `bldCURRENT_PRODUCT${SHAREDLIB_EXT}')
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